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Reactions of carbenes with anions

✍ Scribed by Detlev Sülzle

Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
117 KB
Volume
28
Category
Article
ISSN
0040-4039

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✦ Synopsis

CHBrC12, CHC121 and CHBr21 are prepared by a simple method based on REACTIONS OF CARBENES WITH ANIONS Detlev Siilzle the reaction of dichloro or dibromocarbene with the corresponding alkali metal halogenides under phase transfer conditions.

Although the reaction of the electrophilic carbenes /l/, Ccl2 and CBr2, with alkenes as electron rich reaction partners to prepare dihalocyclopropanes is well known, the similar reaction of these carbenes with anions, through which it is possible to prepare for example methane derivatives /2/, has been given little notice until now. This is even more surprising as the formation of dihalocarbenes in the system haloform / cont. aqueous base / phase transfer catalyst (PTC) offers an excellent opportunity to study these reactions, as the catalyst takes care of the transport of the anions across the phase boundary.

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