Mild protection and deprotection of alcohols as ter-butyl ethers in the field of pheromone synthesis
作者:A Alexakis、M Gardette、S Colin
DOI:10.1016/0040-4039(88)85055-x
日期:1988.1
Copper-Catalyzed Enantioselective Synthesis of <i>trans</i>-1-Alkyl-2-substituted Cyclopropanes via Tandem Conjugate Addition−Intramolecular Enolate Trapping
作者:Tim den Hartog、Alena Rudolph、Beatriz Maciá、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ja105704m
日期:2010.10.20
Cu-TolBINAP-catalyzed conjugate addition of Grignard reagents to 4-chloro-alpha,beta-unsaturated esters, thioesters, and ketones leads to 4-chloro-3-alkyl-substituted thioesters and ketones in up to 84% yield and up to 96% ee upon protonation of the corresponding enolates at low temperature. Tandem conjugate addition-enolate trapping, however, yields trans-1-alkyl-2-substituted cyclopropanes in up to 92% yield and up to 98% ee. The versatility of this reaction is illustrated by the formation of key intermediates for the formal syntheses of cascarillic acid and grenadamide.
BOTAR, A. A.;POPOVICI, I. A. N.;HODOSAM, P. F.
作者:BOTAR, A. A.、POPOVICI, I. A. N.、HODOSAM, P. F.
DOI:——
日期:——
BOTAR, A. -A.;HODOSAN, F. P.
作者:BOTAR, A. -A.、HODOSAN, F. P.
DOI:——
日期:——
BOTAR, ANA AURELIA;POPOVICI, NICOLAE AUGUSTIN;HODOSAN, FRANCISE PETRU
作者:BOTAR, ANA AURELIA、POPOVICI, NICOLAE AUGUSTIN、HODOSAN, FRANCISE PETRU