Enantioselective Synthesis of a Phenylalanine Library Containing Alkyl Groups on the Aromatic Moiety: Confirmation of Stereostructure by X-Ray Analysis

Abstract

Six phenylalanine analogues containing 2′-methyl-, 2′,6′-dimethyl-, 2′-ethyl-6′-methyl-, 2′-isopropyl-6′-methyl-, 2′,4′,6′-trimethyl-, and 3′,5′-dimethyl-L-phenylalanine were synthesized enantioselectively through asymmetric hydrogenation of acetamidoacrylate derivatives. Enzymatic digestion and X-ray analysis supported the L-configuration of the phenylalanine derivatives obtained.