Higher order vinyl cyanocuprates from vinylic tellurides
✍ Scribed by Fábio C. Tucci; André Chieffi; João V. Comasseto
- Book ID
- 103406251
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- French
- Weight
- 291 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
Dilithium cyanocuprates R\*LCu(CN)Li2 (L=2-Th, Me) react with vinylic tellurides of Z configuration, RCH=CHTeRl to give higher order vinylic cyanocuprates, [(RCH=CH)LCu(CN)Li2]. By changing the gegenion from lithium to magnesium [R2LCu(CN)LiMgBr or R2LCu(CN)(MgBr)2] the reaction gives cross -couplin
Duty1 vinyl tellurides and his-vinyl tellurides furnish vinyllithiurns with retention of configuration in good yields upon treatment with nbutyllithium at -7X\*C. Vinylic tellurium species are little investigated. Recently we initiated a systematic study of this class of organnelemental compounds an
AbstractÐTransmetalation reaction between Z-vinylic tellurides and higher order cyanocuprates generated the corresponding Z-vinylic cyanocuprates. Conjugate addition of these cuprates to enones followed by O-functionalization led to silyl enol ethers, vinyl phosphates and vinyl tri¯ates. The vinyl t
Z-Vinylic higher order cyanocuprates, prepared from the corresponding Z-vinylic tellurides, react efficiently with hindered enones in THF/BF3-Et20 or in diethyl ether. In neat THF the hindered enones fail to react with Z-vinyl cyanocuprates prepared in this way.