@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,