Large-Scale Synthesis of a Substituted <scp>d</scp>-Phenylalanine Using Asymmetric Hydrogenation
作者:Martin E. Fox、Mark Jackson、Graham Meek、Matthew Willets
DOI:10.1021/op200129m
日期:2011.9.16
seven-step route based on asymmetrichydrogenation of an N-acetyl dehydroamino-acid was developed. Starting with terephthalic dialdehyde, monoreduction of one aldehyde group, Erlenmeyer condensation, and ring-opening/O-deacetylation with methanol provided the 4-(hydroxymethyl)-substituted dehydrophenylalanine hydrogenation substrate. Asymmetrichydrogenation of this enamide using [((R,R)-Ethyl-DuPhos)Rh(COD)]BF4