Substrate leaving group control of the enantioselectivity in the palladium-catalyzed asymmetric allylic substitution of 4-alkyl-1-vinylcyclohexyl derivatives
作者:Jean Claude Fiaud、Jean Yves Legros
DOI:10.1021/jo00303a016
日期:1990.8
Electronic control of enantioselectivity in the palladium-catalyzed asymmetric allylic substitution of trans 4-tbutyl-l-vinylcyclohexyl benzoates
作者:Jean-Yves Legros、Jean-Claude Fiaud
DOI:10.1016/s0040-4020(01)80768-7
日期:1994.1
The enantioselectivity in the palladium-catalyzedsubstitution of allylic benzoates 1 by sodium dimethyinwlonate was influenced by polar and steric effects of the substituents in the phenyl ring of the benzoate. Electron-donating p-substituents afforded effective chiral differentiation (up to 90%ee). Electron-withdrawing substituents, t-butyl-p-substituent, N,N-dialkylamino p-substituents were or o-substituents