| abstract |
The present invention provides a process for preparation of compound of formula (I), a key intermediate in synthesis of L-glufosinate or its salt. wherein P2 is an amino-protecting group; R1 is hydrogen, substituted or unsubstituted C 1 to C 6 alkyl group, a substituted or unsubstituted C 1 to C 6 alkenyl group, a substituted or unsubstituted C 1 to C 6 alkynyl group, a substituted or unsubstituted C 3 to C 10 cycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a substituted or unsubstituted C2 to C10 heteroaryl group; and X is a halogen or hydroxyl group. |