@article{ChristlKrimmKraft1990,
  author    = {Christl, Manfred and Krimm, Stefan and Kraft, Arno},
  title     = {Some Valenes of Benzannelated Five-Membered Heteroarenes - Synthesis and NMR Spectra},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30026},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ChristlKrimmKraft1990,
  author    = {Christl, Manfred and Krimm, Stefan and Kraft, Arno},
  title     = {Einige Valene von benzanellierten f{\"u}nfgliedrigen Heteroarenen - Synthesen und NMR-Spektren},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31559},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {de}
}
@article{ChristlKraft1988,
  author    = {Christl, Manfred and Kraft, A.},
  title     = {Tricyclo[3.1.1.0\(^{2,6}\)]hexandion (das Valen des o-Benzochinons), Bicyclo[2.1.1]hexan-2,3-dion und Valene eines Chinoxalins, des Phenazins sowie eines Benzophenazins},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58459},
  year      = {1988},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlKraft1988,
  author    = {Christl, Manfred and Kraft, A.},
  title     = {Tricyclo[3.1.1.0\(^{2,6}\)]hexandion (the Valen of o-Benzochinons), Bicyclo[2.1.1]hexan-2,3-dion and Valene of a Chinoxalins, of Phenazins and of a Benzophenazine},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58462},
  year      = {1988},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlKemmerMattauch1986,
  author    = {Christl, Manfred and Kemmer, P. and Mattauch, B.},
  title     = {1-Methylbenzvalen. Synthese und einige Reaktionen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58270},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHuisgen1973,
  author    = {Christl, Manfred and Huisgen, R.},
  title     = {Orientierungsph{\"a}nomene bei der Cycloaddition aliphatischer und aromatischer Nitriloxide an α,β-unges{\"a}ttigte Carbonester},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57942},
  year      = {1973},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHuisgen1968,
  author    = {Christl, Manfred and Huisgen, R.},
  title     = {Alte und neue Cycloadditionen der Nitriloxide},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30237},
  year      = {1968},
  abstract  = {No abstract available},
  language  = {de}
}
@article{ChristlHerzogNusser1986,
  author    = {Christl, Manfred and Herzog, C. and Nusser, R.},
  title     = {Bicyclo[4.1.1]octa-2,4-dien, -oct-2-en, -oct-3-en und -octan aus Norpinen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58326},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHerzogKemmer1986,
  author    = {Christl, Manfred and Herzog, C. and Kemmer, P.},
  title     = {Tricyclo[5.1.0.0\(^{2,8}\)]oct-3-en, -oct-4-en und -octan: Darstellung und Thermolyse der Hydroderivate des Octavalens},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58310},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHerzogBrueckneretal.1986,
  author    = {Christl, Manfred and Herzog, C. and Br{\"u}ckner, D. and Lang, R.},
  title     = {Neue Homobenzvalen-Derivate (Tricylo[4.1.0.0\(^{2,7}\)]hept-3-ene)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58241},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHerzog1986,
  author    = {Christl, Manfred and Herzog, C.},
  title     = {\(^{13}\)C-NMR-Spektroskopie: Besondere Hochfeldeffekte in Bicyclo[4.1.1]- und Tricyclo[5.1.0.0\(^{2,8}\)]octan-Systemen (1,3-Cycloheptadien-Effekt) und besondere Tieffeldeffekte in Dihalogenbicyclo[2.1.1]hex-2-enen (Cyclopenten-Effekt)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58334},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHerzog1987,
  author    = {Christl, Manfred and Herzog, C.},
  title     = {3-(Phenylsulfonyl)tricyclo[4.1.0.0\(^{2,7}\)]hept-4-en-3-yllithium},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58340},
  year      = {1987},
  abstract  = {Phenyl(tricyclo[4.1.0.0\^(^{2,7}\)] hept-4-en-3-yl)sulfone 8 has been prepared in two steps from 4,S-dlbromohomobenzvalene (6) and deprotonated to give the title compound 9. The carbon-13 NMR spectrum of 9 reveals a considerable interaction between the allyl anion moiety and the bicyclobutane system.},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHerbert1979,
  author    = {Christl, Manfred and Herbert, R.},
  title     = {Unusual Carbon Shielding Effects of Cyclopropanes and Double Bonds in Strained Bicyclo[3.1.0]hexanes and Cyclopentenes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58038},
  year      = {1979},
  abstract  = {Carbon-13 shieldings and one-bond \(^{13}\)C-H coupling constants of bicydo[2.1.1]hexane, bicydo[2.l.l]hex- 2-ene, tricydo[3.1.1.0\(^{2.4}\)]heptane and benzvalene are presented and compared. to the data of related. compounds. H a bicydo[3.1.0]hexane system is part of a rigid skeleton, the cydopropane ring exerts spedfk: 'Y substituent eflects of two ldnds. In the case of the bicyclobexane boat form an upfield shift of the C-3 signal is observed and in tbe esse of the chair form a downfield shift of 15-20 ppm. Compared to the corresponding cydopentanes the double bond in strained cydopentenes causes downfield shifts of the C-4 absorption. 1bis eftect increases witb increasing strain, reaching 8 45.9 ppm maximum in benzvalene. Hence it is tbe only known bicydo[l.l.O]butane baving 8 reversed order of carbon shieldings. The downfield shifts are e:xplained by means of simple orbital interaction schemes.},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlHerbert1979,
  author    = {Christl, Manfred and Herbert, R.},
  title     = {Der Einfluß anellierter Ringe auf die \(^{13}\)C-NMR-chemischen Verschiebungen von Tricyclo[3.1.0.0\(^{2,6}\)]hexan- und Bicyclo[2.1.1]hexan-Derivaten},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58058},
  year      = {1979},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHennebergerFreund1988,
  author    = {Christl, Manfred and Henneberger, H. and Freund, S.},
  title     = {Halbk{\"a}figverbindungen aus Polycyclen mit einem Bicyclo[1.1.0]butan-System und dazu benachbarter Azobr{\"u}cke durch Radikalreaktionen mit Thiophenol und Bromtrichlormethan},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58440},
  year      = {1988},
  abstract  = {Aus Benzvalen (J) und 3,6-Bis(2-pyridyl)-l,2,4,5-tetrazin wurde das Dihydropyridazin 2c erhalten, das ebenso wie die bekannten Dihydropyridazine 2a, b mit Cyclopropen in die entsprechende Azoverbindung 3 {\"u}berging. Addition von Thiophenol an 3a, c und 5 lieferte unter Beteiligung des Bicyclobutan-Systems und der Azofunktion die Halbk{\"a}figverbindungen 4a, c bzw. 6. Aus der Umsetzung von 7, in dem die Azobr{\"u}cke durch zwei BicycJobutan- Systeme flankiert ist, mit Thiophenol sowie Bromtrichlormethan gingen die Halbk{\"a}figverbindungen 8 bzw. 9 hervor. An diesen ~eaktionen wirken beide Bicyclobutan-Systeme und die Azofunktion mit.},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlHeinemannKristof1975,
  author    = {Christl, Manfred and Heinemann, U. and Kristof, W.},
  title     = {Thermal Rearrangement of Some Endo-Endo'-Bridged Bicyclo[1.1.0]butanes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57967},
  year      = {1975},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlHegmannReuchleinetal.1987,
  author    = {Christl, Manfred and Hegmann, J. and Reuchlein, H. and Peters, K. and Peters, E.-M. and Schnering, H. G. von},
  title     = {{\"U}berbr{\"u}ckte neungliedrige α,β-unges{\"a}ttigte Enollactone - Synthese aus 5-Phenyl-1,3,4-oxadiazin-6-on-2-carbons{\"a}ure-methylester und Konfigurationsanalyse},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58395},
  year      = {1987},
  abstract  = {The γ-oxoketenes, which are formed from oxadiazinone Ja and strained cyclopentene der1vat1ves, are shown to undergo a pericyclic ring enlargement to give the title compounds 2a, 2b, and 5. In the case of 5, two configurations, one having a cis and the other a trans Iactone functionality, are in equilibrium.},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlGerstnerKemmeretal.1994,
  author    = {Christl, Manfred and Gerstner, E. and Kemmer, R. and Llewellyn, G. and Bentley, T. W.},
  title     = {Elektrophile Additionen an das Bicyclo[1.1.0]butan-System von 1-Phenyl- und 1-(4-Anisyl)tricyclo[4.1.0.0\(^{2,7}\)]heptan: S{\"a}ure-katalysierte Reaktionen mit Wasser und Methanol, Anlagerung von Essigs{\"a}ure und Oxymercurierung},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58696},
  year      = {1994},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlFreundHennebergeretal.1988,
  author    = {Christl, Manfred and Freund, S. and Henneberger, H. and Kraft, A. and Hauck, J. and Irngartinger, H.},
  title     = {Several Polycyclic Valence Isomers of Dimethyl [14]Annulene-1,8-dicarboxylate. Reactivity of a "Nonconjugated" Bis(bicyclo[1.1.0]butane)},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58413},
  year      = {1988},
  abstract  = {Diels-Alder reaction of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate (5) with benzvalene (4), norbornene, and norbornadiene afforded the azo compounds 7 and 8. Theseare derivatives of 2,3-diazabicyclo[2.2.2]oct-2-ene as is azo compound 3, which had been obtained previously from 5 and 2 equiv of benzvalene (4). The photochemical extrusion of nitrogen from 3, 7, and 8 has been studied. Whereas 7 and 8 on direct irradiation in benzene gave rise exclusively to the bicyclo[2.2.0]hexane derivatives 9 and 10, respectively, from 3 in addition to the bicyclo[2.2.0]hexane 11, the diolefin 1l was formed. Diolefin 12 has cisdouble bonds in the nine-membered ring and is fixed in a boat conformation in a manner so that the two bicyclobutane systems approach each other very closely. This geometry suggests the unusual ring opening of the intermediate 1,4-cyclohexanediyl diradical from a boat conformation, which arises by inversion of the primarily generated boat conformation. Sensitized photolysis of 3 as weilasthat of ll produced the saturated isomer 13 of 11 and 12. The proximity of the bicyclobutane systems in 1l causes unprecedented reactions leading to cage compounds. When ll was heated at 90 °C, a rearrangement to the pentacyclic product 10 took place. Utilization of tetradeuteriated substrate ll-d4 supported a pathway with two diradical intermediates. Behaving in a convcntional manncr, bicyclobutane 9 and bis(bicyclobutane) 11 took up 1 and 2 equiv of thiophenol most probably in a radical-chain addition to give the thioethers 28 and 19, respectively. In contrast, bis(bicyclobutane) ll was converted by 1 equiv of thiophenol into cagc compound 30 in a process involving both the strained a systems. Heating at 80 °C subjected 30 to a reversible Copc rearrangement, resulting in a 6:1 mixture of 31 and 30. When it was treated with bromine, 11 was transformed to cage compound 38. This addition is believed to proceed via a cationic intermediate. The structure of cage compound 10 was established by a singlc-crystal X-ray analysis of dialcohol 11 prepared from 20 and methyllithium.},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlFreund1985,
  author    = {Christl, Manfred and Freund, S.},
  title     = {Substituierte Benzobenzvalene und Diazabenzobenzvalene - Synthesen aus Diels-Alder-Addukten des Benzvalens und NMR-Spektroskopie},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58183},
  year      = {1985},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlFreitagBruentrup1978,
  author    = {Christl, Manfred and Freitag, G. and Br{\"u}ntrup, G.},
  title     = {Der Aufbau des Tetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptan-Systems durch Addition halogensubstituierter Carbene an Benzvalen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58019},
  year      = {1978},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlFreitagBruentrup1978,
  author    = {Christl, Manfred and Freitag, G. and Br{\"u}ntrup, G.},
  title     = {Tricyclo[4.1.0.0\(^{2,7}\)]hept-3-ene durch Umlagerung von 7-endo-Brom- und 7-endo-Chlortetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptanen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58029},
  year      = {1978},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlFreitag1976,
  author    = {Christl, Manfred and Freitag, G.},
  title     = {Das Tricyclo[4.1.0.0\(^{2,7}\)]heptenyl-Kation, ein neues Isomer des Tropylium-Ions},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57985},
  year      = {1976},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBuchner1978,
  author    = {Christl, Manfred and Buchner, Wolfgang},
  title     = {<sup>13</sup>C-NMR-Spektren von Tetracyclo[4.1.0.0<sup>2,4</sup>.0<sup>3,5</sup>]heptanen, Tetracyclo[5.1.0.0<sup>2,4</sup>.0<sup>3,5</sup>]octanen und Tricyclo[4.1.0.0<sup>2,7</sup>]hept-3-enen. Ungew{\"o}hnliche beta- und gamma-Substituenteneffekte},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30087},
  year      = {1978},
  abstract  = {No abstract available},
  language  = {de}
}
@article{ChristlBruentrup1974,
  author    = {Christl, Manfred and Br{\"u}ntrup, Gisela},
  title     = {Diimine Reduction and Ozonolysis of Benzvalene},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57953},
  year      = {1974},
  abstract  = {Via reduction of benzvalene (1) with diirnine tricyclo[3.1.0.02•6]hexane is obtained in good yield. The procedure renders 3, which has already been synthesized by Lemal and Shim, accessible much easier and in larger quantities. IH and 13C n.m.r. spectroscopic data are discussed. Both the thermal and the AgBF4-catalyzed rearrangernent of 3 yield 1,3-cyclohexadiene (8). - The ozonolysis of 1 with subsequent LiAIH4-reduction results in cis-I,3- bis(hydroxyrnethyl)cyclobutane (13a).},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlBrueckner1986,
  author    = {Christl, Manfred and Br{\"u}ckner, D.},
  title     = {Der Einfluß von Phenylgruppen auf die Homokonjugation im Bicyclo[3.2.1]octa-3,6-dien-2-yl-Anion. Eine \(^{13}\)C-NMR-Studie},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58288},
  year      = {1986},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBrunnLanzendorfer1984,
  author    = {Christl, Manfred and Brunn, Erich and Lanzendorfer, Franz},
  title     = {Reactions of Benzvalene with Tetracyanoethylene, 2,3-Dichloro-5,6-dicyano-rho-benzoquinone, Chlorosulfonyl Isocyanate, and Sulfur Dioxide. Evidence for Concerted 1,4-Cycloadditions to a Vinylcyclopropane System},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30052},
  year      = {1984},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ChristlBrunnRothetal.1989,
  author    = {Christl, Manfred and Brunn, E. and Roth, W. R. and Lennartz, H.-W.},
  title     = {7-Methyl- and 7-Phenylcyclohepta-1,3,5-trienes from Benzvalene Via 3,3a,4,5,6,6a-Hexahydro-4,5,6-methenocyclopentapyrazoles and Tetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptanes},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58471},
  year      = {1989},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlBrunnKraftetal.1989,
  author    = {Christl, Manfred and Brunn, E. and Kraft, A. and Irngartinger, H. and Huber-Patz, U.},
  title     = {Nichtbindende Wechselwirkungen in zwei 7-Spirotetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptanen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58489},
  year      = {1989},
  abstract  = {Die Reaktion von Tetrachlordiazocyclopentadien mit Be.nzvalen (2) ergab das Fulven-Derivat 3. Dagegen f{\"u}hrten die Umsetzungen von Diazoßuoren und 5-Diazo-10,1 1-dihydro-SH-dibenzo[ a.d]cyclohepten mit 2 zu den erwarteten Spiro-1-pyrazolinen 4 bzw. 5. Die photolytische Abspaltung von Stickstoff aus 4 und 5 lieferte die Spirotetracycloheptane 6 bzw. 7. Die R{\"o}ntgenstrukturanalyse von 6 beweist einen engen Kontakt zwischen je eineßl Wasserstoffatom der Tetracycloheptan- und der Fluoren-Einheit. Dieser kurze Abstand (2.15 A) ruft Winkelaufweitungen hervor und wird auch als Grund f{\"u}r starke Entschirmungen der betreffenden Protonen und eine formal {\"u}ber sieben Bindungen reichende 0.6-Hz-Kopplung zwischen ihnen angesehen. 7 ist das erste chiralc Tetracyclohcptan. Ursache daf{\"u}r ist eine nichtebene Konformation des Siebenrings, der bei Raumtemperatur nicht invertiert. Auf der Basis von NOE-Messungen gelang die Zuordnung der tH-NMR-Signale von 6 und 7.},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBrunn1981,
  author    = {Christl, Manfred and Brunn, E.},
  title     = {Tetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptane aus 7,8-Diazatetracyclo[4.3.0.0\(^{2,4}\).0\(^{3,5}\)]non-7-enen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58094},
  year      = {1981},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBraun1989,
  author    = {Christl, Manfred and Braun, Max},
  title     = {Photocycloadditionen des Benzvalens},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58492},
  year      = {1989},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBraun1989,
  author    = {Christl, Manfred and Braun, Max},
  title     = {Photocycloadditions of Benzvalene},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58506},
  year      = {1989},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlBraunWolzetal.1994,
  author    = {Christl, Manfred and Braun, Martin and Wolz, E. and Wagner, W.},
  title     = {Cycloallene, 9 - 1-Phenyl-1-aza-3,4-cyclohexadien, das erste Isodihydropyridin: Erzeugung und Abfangreaktionen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58714},
  year      = {1994},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{ChristlBraunMueller1992,
  author    = {Christl, Manfred and Braun, Martin and M{\"u}ller, Germar},
  title     = {1,2,4-Cyclohexatriene, an Isobenzene, and Bicyclo[4.4.0)deca-1,3,5,7,8-pentaene, an Isonaphthalene: Generation and Trapping Reactions},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58639},
  year      = {1992},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{ChristlBraunMueller1992,
  author    = {Christl, Manfred and Braun, Martin and M{\"u}ller, Germar},
  title     = {1,2,4-Cyclohexatrien, ein Isobenzol, und Bicyclo[4.4.0]deca-1,3,5,7,8-pentaen, ein Isonaphthalin : Erzeugung und Abfangreaktionen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30249},
  year      = {1992},
  abstract  = {No abstract available},
  language  = {de}
}
@article{ChristlBraun1989,
  author    = {Christl, Manfred and Braun, Martin},
  title     = {Generation and interception of 1-OXA-2,3-Cyclohexadiene and 1,2,4-Cyclohexatriene},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-56566},
  year      = {1989},
  abstract  = {The cycloadducts 6 and 7 of tricyc1o[4.1.0.0 2 ,7)hepta- 3,4-diene (~) with styrene and 1,3-butadiene rearrange to unusual products on thermolysis, namely the cycloheptatriene derivatives ~ and 10. 1-0xa-3,4-cyclohexadiene (20) is generated smoothly from 6,6-dichloro-3-oxabicyclo[3.1.0]hexane (22) and n-butyllithium. 1-0xa-2,3-cyclohexadiene (11) is formed from 6-exo-bromo-6-endo-fluoro-2-oxabicyclo[ 3.1.0]hexane (30) and methyllithium. In the presence of activated olefins, this reaction provides an efficient route to 28 and 33 - 38, the trapping products of 21. Interestingly, [2+2]-cycloadditions do not take place at the same double bond of 21 as [4+2]-cycloadditions. The reactions of 1,3-cyclopentadiene and indene with bromofluorocarbene afford 6-exo-bromo-6-endo-fluorobicyclo[3.1.0]hex-2-ene (50) and its benzo derivative ~, respectively. On treatment of these compounds with methyl lithium in the presence of styrene, the interception products 53 and 47 of 1,2,4-cyc10- hexatriene (44) and its benzo derivative 43, respectively, are formed in good yields.},
  subject      = {Chemie},
  language  = {en}
}
@article{ChristlBraun1989,
  author    = {Christl, Manfred and Braun, Martin},
  title     = {Freisetzung und Abfangreaktionen von 1-Oxa-2,3-cyclohexadien},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58517},
  year      = {1989},
  abstract  = {Umsetzung von 6,6-Dichlor-2-oxabicyclo[3.1.0)hexan (4a) in Styrol mit n-Butyllithium lieferte neben Polystyrol und t-Chlor-1- pbenylhexan (6) in geringer Ausbeute die Tet~hydrocyclobutapyrane 5, die Abfangprodukte des aus 4a generierten t-Oxa-2,3- cyclobexadiens (3). Das unbest{\"a}ndige 6,6-Dibrom-2-oxabicyclo( J.l.O]hexan (4b) wurde bei -60°C erzeugt un~ bei -30°C mit Methyllithium in Gegenwart von Styrol umgesetzt, woraus die Produkte 5 mit 24\% Ausbeute hervorgingen. Als bei 20°C best{\"a}ndige Quelle f{\"u}r 3 erwies sich exo-6-Brom-e~o-6-fluor-2-oxabicyclo[ J.t.O]bexan (9), das aus 2,3-Dihydrofuran und Bromßuorcarben mit 25\% Ausbeute bereitet wurde. Behandlung von 9 in Styrol, <X-Methylstyrol, 1,3-Butadien, 2,3-Dimet~yl-!,3-butadien, Furan und 2,5-Dimethylfuran mit Methyllithium ergab Abfangprodukte von 3 mit Ausbeuten von 31-80\%. Dabei entstanden mit den Styrolen und {\"u}berwiegend auch mit den l ,3-Butadienen (2 + 2]-Cycloaddukte als Diastereomerengemische, n{\"a}mlich 5, ll, 13 und 15. Die Furane lieferten ausschließlieb [4 + 2]-Cycloaddukte (17 und 18), die 1,3-Butadiene nur mit einem kleinen Anteil (14 und 16). [2 + 2]- und [4 + 2]-Cycloadditionen zeigen eine unterschiedliche Chemoselektivit{\"a}t. W{\"a}hrend erstere die Enolether- Doppelbindung von 3 nutzen, finden letztere an der vom Sauerstoffatom entfernteren Doppelbindung statt. Das als 1 : IGemisch aus exo- und endo-Isomeren anfallende Produkt 5 lieferte beim Erhitzen auf l50°C ein 20:1: 1-Gemiseh aus exo- und endo-5 sowie dem Strukturisomeren 19. Thermolyse· des 2: 1-Gemisches aus 13 und 14 erbrachte ein 2: 1-Gemiscb aus 14 und dem Tetrahydro-1-benzopyran 20.},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{Christl1975,
  author    = {Christl, Manfred},
  title     = {\(^{13}\)-NMR-Spektren von Bicyclo[n.1.0]kohlenwasserstoffen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57977},
  year      = {1975},
  abstract  = {No abstract available},
  subject      = {Organische Chemie},
  language  = {de}
}
@article{Christl1975,
  author    = {Christl, Manfred},
  title     = {Carbon-13 Chemical Shifts and 13C-15N Coupling Constants of 3,4-Dihydroisoquinoline-15N, its 15N-Oxide and their Conjugate Acids},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30071},
  year      = {1975},
  abstract  = {No abstract available},
  language  = {en}
}
@article{Christl1981,
  author    = {Christl, Manfred},
  title     = {Benzvalen - Eigenschaften und Synthesepotential},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30041},
  year      = {1981},
  abstract  = {No abstract available},
  language  = {de}
}
@article{Christl1973,
  author    = {Christl, Manfred},
  title     = {Cycloaddition an Benzvalen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30217},
  year      = {1973},
  abstract  = {No abstract available},
  language  = {de}
}
@article{CeymanRosspeintnerSchrecketal.2016,
  author    = {Ceyman, Harald and Rosspeintner, Arnulf and Schreck, Maximilian H. and M{\"u}tzel, Carina and Stoy, Andreas and Vauthey, Eric and Lambert, Christoph},
  title     = {Cooperative enhancement versus additivity of two-photon-absorption cross sections in linear and branched squaraine superchromophores},
  series = {Physical Chemistry Chemical Physics},
  volume    = {18},
  journal   = {Physical Chemistry Chemical Physics},
  number    = {24},
  doi       = {10.1039/c6cp02312f},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-188299},
  pages     = {16404-16413},
  year      = {2016},
  abstract  = {The linear and nonlinear optical properties of a series of oligomeric squaraine dyes were investigated by one-photon absorption spectroscopy (1PA) and two-photon absorption (2PA) induced fluorescence spectroscopy. The superchromophores are based on two indolenine squaraine dyes with transoid (SQA) and cisoid configuration (SQB). Using these monomers, linear dimers and trimers as well as star-shaped trimers and hexamers with benzene or triphenylamine cores were synthesised and investigated. The red-shifted and intensified 1PA spectra of all superchromophores could well be explained by exciton coupling theory. In the linear chromophore arrangements we also found superradiance of fluorescence but not in the branched systems. Furthermore, the 2PA showed enhanced cross sections for the linear oligomers but only additivity for the branched systems. This emphasizes that the enhancement of the 2PA cross section in the linear arrangements is probably caused by orbital interactions of higher excited configurations.},
  language  = {en}
}
@article{CecilRikanovicOhlsenetal.2011,
  author    = {Cecil, Alexander and Rikanovic, Carina and Ohlsen, Knut and Liang, Chunguang and Bernhardt, Jorg and Oelschlaeger, Tobias A. and Gulder, Tanja and Bringmann, Gerd and Holzgrabe, Ulrike and Unger, Matthias and Dandekar, Thomas},
  title     = {Modeling antibiotic and cytotoxic effects of the dimeric isoquinoline IQ-143 on metabolism and its regulation in Staphylococcus aureus, Staphylococcus epidermidis and human cells},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-68802},
  year      = {2011},
  abstract  = {Background: Xenobiotics represent an environmental stress and as such are a source for antibiotics, including the isoquinoline (IQ) compound IQ-143. Here, we demonstrate the utility of complementary analysis of both host and pathogen datasets in assessing bacterial adaptation to IQ-143, a synthetic analog of the novel type N,C-coupled naphthyl-isoquinoline alkaloid ancisheynine. Results: Metabolite measurements, gene expression data and functional assays were combined with metabolic modeling to assess the effects of IQ-143 on Staphylococcus aureus, Staphylococcus epidermidis and human cell lines, as a potential paradigm for novel antibiotics. Genome annotation and PCR validation identified novel enzymes in the primary metabolism of staphylococci. Gene expression response analysis and metabolic modeling demonstrated the adaptation of enzymes to IQ-143, including those not affected by significant gene expression changes. At lower concentrations, IQ-143 was bacteriostatic, and at higher concentrations bactericidal, while the analysis suggested that the mode of action was a direct interference in nucleotide and energy metabolism. Experiments in human cell lines supported the conclusions from pathway modeling and found that IQ-143 had low cytotoxicity. Conclusions: The data suggest that IQ-143 is a promising lead compound for antibiotic therapy against staphylococci. The combination of gene expression and metabolite analyses with in silico modeling of metabolite pathways allowed us to study metabolic adaptations in detail and can be used for the evaluation of metabolic effects of other xenobiotics.},
  subject      = {Staphylococcus aureus},
  language  = {en}
}
@article{BuendgenEngelsPeyerimhoff1991,
  author    = {B{\"u}ndgen, P. and Engels, Bernd and Peyerimhoff, S.D.},
  title     = {An MRD-CI study of low-lying electronic states in CaF},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58880},
  year      = {1991},
  abstract  = {Dipole moments and various spectroscopic constants of some low-lying electronic states of the CaF molecule have been calculated using the multireference single· and double-excitation configuration-interaction (MRD-CI) method. The electronic structure of the highly ionic molecule in various excited states can be explained in tenns of different polarisations of the mainly Cacentered valence electron in the field of the F\(^-\) anion. Plots of natural orbitals occupied by the valence electron in the different states give a qualitative picture of the charge distribution and provide a visualisation of the different polarisations of the valence electron in the various states. Comparisons with the electrostatic polarisation model ofT{\"o}rring, Ernstand K{\"a}ndler (TEK model) are made. The unknown A' \(^2 \Delta\) state is predicted to lie about 21200 cm\(^{-1}\) above the ground state.},
  subject      = {Organische Chemie},
  language  = {en}
}
@article{BaeumerKarthaAllampallyetal.2019,
  author    = {B{\"a}umer, Nils and Kartha, Kalathil K. and Allampally, Naveen Kumar and Yagai, Shiki and Albuquerque, Rodrigo Q. and Fern{\´a}ndez, Gustavo},
  title     = {Kontrolle {\"u}ber Selbstassemblierung durch Ausnutzung von Koordinationsisomerie},
  series = {Angewandte Chemie},
  volume    = {131},
  journal   = {Angewandte Chemie},
  number    = {44},
  doi       = {10.1002/ange.201908002},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-212176},
  pages     = {15772 -- 15776},
  year      = {2019},
  abstract  = {Hierin wird die inh{\"a}rente geometrische Isomerie eines PtII Komplexes als neues Werkzeug zur Kontrolle von supramolekularen Assemblierungsprozessen ausgenutzt. Bestrahlung mit UV-Licht sowie die sorgf{\"a}ltige Auswahl des verwendeten L{\"o}sungsmittels, der Temperatur und Konzentration f{\"u}hren zu einer regelbaren Koordinationsisomerie. Dies erm{\"o}glicht ein vollst{\"a}ndig reversibles Schalten zwischen zwei definierten aggregierten Spezies (1D Fasern ↔ 2D Lamellen) mit unterschiedlichem photoresponsivem Verhalten. Unsere Erkenntnisse erweitern nicht nur die Reichweite von Koordinationsisomerie, sondern er{\"o}ffnen auch aufregende M{\"o}glichkeiten zur Entwicklung neuartiger stimuliresponsiver Materialien.},
  language  = {de}
}
@article{BruentrupChristl1973,
  author    = {Br{\"u}ntrup, Gisela and Christl, Manfred},
  title     = {Darstellung und Thermolyse der Hexamethyldewarbenzol-Cycloaddukte aromatischer Nitriloxide und des Diphenylnitrilimins},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30257},
  year      = {1973},
  abstract  = {No abstract available},
  language  = {en}
}
@article{BruennertSeupelGoyaletal.2023,
  author    = {Br{\"u}nnert, Daniela and Seupel, Raina and Goyal, Pankaj and Bach, Matthias and Schraud, Heike and Kirner, Stefanie and K{\"o}ster, Eva and Feineis, Doris and Bargou, Ralf C. and Schlosser, Andreas and Bringmann, Gerhard and Chatterjee, Manik},
  title     = {Ancistrocladinium A induces apoptosis in proteasome inhibitor-resistant multiple myeloma cells: a promising therapeutic agent candidate},
  series = {Pharmaceuticals},
  volume    = {16},
  journal   = {Pharmaceuticals},
  number    = {8},
  issn      = {1424-8247},
  doi       = {10.3390/ph16081181},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-362887},
  year      = {2023},
  abstract  = {The N,C-coupled naphthylisoquinoline alkaloid ancistrocladinium A belongs to a novel class of natural products with potent antiprotozoal activity. Its effects on tumor cells, however, have not yet been explored. We demonstrate the antitumor activity of ancistrocladinium A in multiple myeloma (MM), a yet incurable blood cancer that represents a model disease for adaptation to proteotoxic stress. Viability assays showed a potent apoptosis-inducing effect of ancistrocladinium A in MM cell lines, including those with proteasome inhibitor (PI) resistance, and in primary MM cells, but not in non-malignant blood cells. Concomitant treatment with the PI carfilzomib or the histone deacetylase inhibitor panobinostat strongly enhanced the ancistrocladinium A-induced apoptosis. Mass spectrometry with biotinylated ancistrocladinium A revealed significant enrichment of RNA-splicing-associated proteins. Affected RNA-splicing-associated pathways included genes involved in proteotoxic stress response, such as PSMB5-associated genes and the heat shock proteins HSP90 and HSP70. Furthermore, we found strong induction of ATF4 and the ATM/H2AX pathway, both of which are critically involved in the integrated cellular response following proteotoxic and oxidative stress. Taken together, our data indicate that ancistrocladinium A targets cellular stress regulation in MM and improves the therapeutic response to PIs or overcomes PI resistance, and thus may represent a promising potential therapeutic agent.},
  language  = {en}
}
@article{BrustNaglerShoyamaetal.2023,
  author    = {Brust, Felix and Nagler, Oliver and Shoyama, Kazutaka and Stolte, Matthias and W{\"u}rthner, Frank},
  title     = {Organic Light-Emitting Diodes Based on Silandiol-Bay-Bridged Perylene Bisimides},
  series = {Advanced Optical Materials},
  volume    = {11},
  journal   = {Advanced Optical Materials},
  number    = {5},
  doi       = {10.1002/adom.202202676},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-312599},
  year      = {2023},
  abstract  = {Perylene bisimides (PBIs) are among the best fluorophores but have to be enwrapped for optoelectronic applications by large and heavy substituents to prevent their ππ-stacking, which is known to accelerate non-radiative decay processes in the solid state. Here, light-weight di-tert-butylsilyl groups are introduced to bridge 1,12-dihydroxy and 1,6,7,12-tetrahydroxy PBIs to afford sublimable dyes for vacuum-processed optoelectronic devices. For both new compounds, this substitution provides a twisted and shielded perylene π-core whose, via OSiObridges, rigid structure affords well-resolved absorption and emission spectra with strong fluorescence in solution, as well as in the solid state. The usefulness of these dyes for vacuum-processed optoelectronic devices is demonstrated in organic light-emitting diodes (OLEDs) that show monomer-like emission spectra and high maximum external quantum efficiency (EQEmax) values of up to 3.1\% for the doubly silicon-bridged PBI.},
  language  = {en}
}
@article{BrixnerKochKullmannetal.2013,
  author    = {Brixner, Tobias and Koch, Federico and Kullmann, Martin and Selig, Ulrike and Nuernberger, Patrick and G{\"o}tz, Daniel C. G. and Bringmann, Gerhard},
  title     = {Coherent two-dimensional electronic spectroscopy in the Soret band of a chiral porphyrin dimer},
  series = {New Journal of Physics},
  journal   = {New Journal of Physics},
  doi       = {10.1088/1367-2630/15/2/025006},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-96139},
  year      = {2013},
  abstract  = {Using coherent two-dimensional (2D) electronic spectroscopy in fully noncollinear geometry, we observe the excitonic coupling of β,β'-linked bis[tetraphenylporphyrinato-zinc(II)] on an ultrafast timescale in the excited state. The results for two states in the Soret band originating from an excitonic splitting are explained by population transfer with approximately 100 fs from the energetically higher to the lower excitonic state. This interpretation is consistent with exemplary calculations of 2D spectra for a model four-level system with coupling.},
  language  = {en}
}
@article{BrennerGeigerSchlegeletal.2023,
  author    = {Brenner, Daniela and Geiger, Nina and Schlegel, Jan and Diesendorf, Viktoria and Kersting, Louise and Fink, Julian and Stelz, Linda and Schneider-Schaulies, Sibylle and Sauer, Markus and Bodem, Jochen and Seibel, J{\"u}rgen},
  title     = {Azido-ceramides, a tool to analyse SARS-CoV-2 replication and inhibition — SARS-CoV-2 is inhibited by ceramides},
  series = {International Journal of Molecular Sciences},
  volume    = {24},
  journal   = {International Journal of Molecular Sciences},
  number    = {8},
  issn      = {1422-0067},
  doi       = {10.3390/ijms24087281},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-313581},
  year      = {2023},
  abstract  = {Recently, we have shown that C6-ceramides efficiently suppress viral replication by trapping the virus in lysosomes. Here, we use antiviral assays to evaluate a synthetic ceramide derivative α-NH2-ω-N3-C6-ceramide (AKS461) and to confirm the biological activity of C6-ceramides inhibiting SARS-CoV-2. Click-labeling with a fluorophore demonstrated that AKS461 accumulates in lysosomes. Previously, it has been shown that suppression of SARS-CoV-2 replication can be cell-type specific. Thus, AKS461 inhibited SARS-CoV-2 replication in Huh-7, Vero, and Calu-3 cells up to 2.5 orders of magnitude. The results were confirmed by CoronaFISH, indicating that AKS461 acts comparable to the unmodified C6-ceramide. Thus, AKS461 serves as a tool to study ceramide-associated cellular and viral pathways, such as SARS-CoV-2 infections, and it helped to identify lysosomes as the central organelle of C6-ceramides to inhibit viral replication.},
  language  = {en}
}