Asymmetric synthesis of all isomers of α-methyl-β-phenylserine
作者:Alberto Avenoza、Carlos Cativiela、Francisco Corzana、Jesús M Peregrina、Marı́a M Zurbano
DOI:10.1016/s0957-4166(00)00149-x
日期:2000.6
This report describes the synthesis of enantiomerically pure (2R,3R)-, (2R,3S)-, (2S,3S)- and (2S,3R)-2-amino-3-hydroxy-2-methyl-3-phenylpropanoic acids, four quaternary α-amino acids, using a stereodivergent synthetic route and starting from (S)- and (R)-N-Boc-N,O-isopropylidene-α-methylserinals. The key step involves the asymmetric Grignard additions to the above chiral aldehydes, in which high levels