Asymmetric synthesis of anti-α-alkyl-β-amino carboxamides
作者:Stephen G. Davies、Alison J. Edwards、Iain A. S. Walters
DOI:10.1002/recl.19951140409
日期:——
enolates derived from the highly diastereoselectiveconjugateadditions of lithium (R)-N-benzyl-N-α-methylbenzylamide (R)-1 to N, N-dimethyl crotonamide 2 and N, N-dimethyl cinnamide 3 have been investigated. The alkylations of enolates derived from 3 are shown to afford anti-α-alkyl-β-amino carboxamides with excellent stereocontrol: the stereochemistry is assigned with the aid of a single crystal X-ray structure