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Borane-Substituted Imidazol-2-ylidenes: Syntheses, Structures, and Reactivity☆

✍ Scribed by Andreas Wacker; Hans Pritzkow; Walter Siebert

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
663 KB
Volume
1998
Category
Article
ISSN
1434-1948

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✦ Synopsis

Reactions of the Lewis acids BH 3 and BEt 3 with trimethylimidazole (1) lead to the borane adducts 2a and 2b. Deprotonation of 2a with n-butyllithium results in the formation of the novel N-borane-substituted imidazol-2ylidene anion 3a -whereas deprotonated 2b rearranges unexpectedly to the anionic compound 3b -. This can be transformed into the carbene-borane adduct 4 by

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