Ty. Chau et al., A PRACTICAL ROUTE TO CHIRAL PHENYLALANINE VIA THE CONDENSATION OF KETO ACIDS WITH AMIDES AND ASYMMETRIC HYDROGENATION, Journal of the Chinese Chemical Society, 42(6), 1995, pp. 977-980
The condensation of beta-phenylpyruvic acid with amides gave olefinic
intermediates in good yields (75-80%). The asymmetric catalytic hydrog
enation of alpha-acetamidocinnamic acid with high enantioselectivity i
s described.