Patent ID: 7102013

Claim:
A method for the preparation of an alpha-amino acid compound having the structure of Formula 32: or a salt, an enantiomer, or a racemate thereof, wherein: R 2 is selected from the group consisting of C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 1 -C 5 alkoxy-C 1 alkyl, and C 1 -C 5 alkylthio-C 1 alkyl; R 1 , R 5 , R 6 , and R 7 independently are selected from the group consisting of —H, halogen, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, and C 1 -C 5 alkoxy-C 1 alkyl; R 9 and R 10 independently are selected from the group consisting of —H, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, and C 1 -C 5 alkoxy-C 1 alkyl; and when any of R 1 , R 2 , R 5 , R 6 , R 7 , R 9 , and R 10 independently is a moiety selected from the group consisting of alkyl, alkenyl, and alkynyl, then the moiety is optionally substituted by one or more substituent selected from the group consisting of —OH, alkoxy, and halogen; wherein the method comprises hydrolyzing a hydantoin compound having the structure of Formula 33: or a salt, an enantiomer, or a racemate thereof, thereby forming the alpha-amino acid compound.