Asymmetric 1,4-addition of organocuprates to chiral .alpha.,.beta.-unsaturated N-acyl-4-phenyl-2-oxazolidinones: a new approach to the synthesis of chiral .beta.-branched carboxylic acids
Asymmetric 1,4-addition of organocuprates to chiral .alpha.,.beta.-unsaturated N-acyl-4-phenyl-2-oxazolidinones: a new approach to the synthesis of chiral .beta.-branched carboxylic acids
Diastereospecific tandem Michael-like addition / electrophilic bromination: A one-pot tandem asymmetric synthesis of precursors of unusual amino acids
作者:Guigen Li、Mark A. Jarosinski、Victor J. Hruby
DOI:10.1016/s0040-4039(00)77625-8
日期:1993.4
A systematic series of key intermediates of unusual β-methyl-amino acids have been synthesized by using a modified Evans auxiliary in an asymmetric Michael-like reaction followed by direct bromination in a one-pot reaction.
Asymmetric 1,4-addition of organocuprates to chiral .alpha.,.beta.-unsaturated N-acyl-4-phenyl-2-oxazolidinones: a new approach to the synthesis of chiral .beta.-branched carboxylic acids