TY  - JOUR
A1  - Thiess, Torsten
A1  - Mellerup, Soren  K.
A1  - Braunschweig, Holger
T1  - B–B Cleavage and Ring-Expansion of a 1,4,2,3-Diazadiborinine with N-Heterocyclic Carbenes
T2  - Chemistry - A European Journal
N2  - A 1,4,2,3‐diazadiborinine derivative was found to form Lewis adducts with strong two‐electron donors such as N‐heterocyclic and cyclic (alkyl)(amino)carbenes. Depending on the donor, some of these Lewis pairs are thermally unstable, converting to sole B,N‐embedded products upon gentle heating. The products of these reactions, which have been fully characterized by NMR spectroscopy, elemental analysis, and single‐crystal X‐ray diffraction, were identified as B,N‐heterocycles with fused 1,5,2,4‐diazadiborepine and 1,4,2‐diazaborinine rings. Computational modelling of the reaction mechanism provides insight into the formation of these unique structures, suggesting that a series of B−H, C−N, and B−B bond activation steps are responsible for these “intercalation” reactions between the 1,4,2,3‐diazadiborinine and NHCs.
KW  - B,N-heterocylcles
KW  - B-B bond activation
KW  - diazadiborinines
KW  - NHCs
KW  - ring-expansion reactions
Y1  - 2019
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/20617
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-206173
VL  - 25
IS  - 59
ER  -