PROCESS FOR PREPARING 4-AMINO-5-HEXENOIC ACID

摘要

4-Amino-5-hexenoic acid is prepared by: (a) reacting 5-oxo-2-pyrrolidine-acetonitrile with hydrogen and dimethylamine in the presence of a palladium catalyst to form N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]ethylamine; (b) oxidizing N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]-ethylamine to produce the corresponding N-oxide derivative; (c) pyrolysis of the N-oxide derivative to form 5-vinyl-2-pyrrolidinone; (d) optionally, separating N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]ethylamine by-product from the 5-vinyl-2-pyrrolidinone product; and (e) hydrolyzing 5-vinyl-2-pyrrolidinone to form 4-amino-5-hexenoic acid.