Patent ID: 7476758

Claim:
A process for preparing a phenylalanine compound of the formula (I): wherein X 1 is a halogen atom, X 2 is a halogen atom, Q is a group of the formula —CH 2 or —(CH 2 ) 2 — and Y is a C 1-6 alkyl group, or a pharmaceutically acceptable salt thereof, which comprises condensing a compound of the formula (IV) wherein CO 2 R is a protected carboxyl group and the other symbols are the same as defined above, or a salt thereof, with a compound of the formula (III): wherein the symbols are the same as defined above, a salt thereof or an acid halide thereof to yield a compound of the formula (II): wherein the symbols are the same as defined above, and removing the protecting group from the protected carboxyl group of the compound (II), and, optionally, followed by converting the resulting compound into a pharmaceutically acceptable salt.