Asymmetric synthesis of unusual amino acids: Synthesis of optically pure isomers of β-methylphenylalanine
作者:Ramalinga Dharanipragada、Ernesto Nicolas、Geza Toth、Victor J. Hruby
DOI:10.1016/s0040-4039(01)93366-0
日期:1989.1
All the four individual isomers of β-methylphenylalanine have been synthesized in very high optical purities by utilizing in part the chiral imide enolate bromination methodology of Evans and co-workers.
A New Strategy for the Synthesis of Four Individual Isomers of β-Methylphenylalanine
作者:Feng-Di Lung、Guigen Li、Bith-Show Lou、Victor J. Hruby
DOI:10.1080/00397919508010789
日期:1995.1
Abstract The application of an allylic strain effect in boron enolates and asymmetric Michael-like addition/electrophilic bromination reactions is reported for the asymmetric synthesis of the individual isomers of unusual constrained amino acids. For β-substituted α-amino acids, all of the final optically pure products were identical to authentic samples, which provided further and unequivocal evidence