Process for the production of alkoxycarbonyl-dipeptides intermediates in the synthesis of the lisinopril

摘要

Process for the production of alkoxycarbonyldipeptides intermediates in the synthesis of the lisinopril which comprises protecting both amino functions of the L-lysine with an alkoxycarbonyl group, subsequently making the N-carboxyanhydride of the N6-[alkoxycarbonyl]-L-lysine by treatment with thionyl chloride and making the desired alkoxycarbonyldipeptide by reaction with L-proline in alkaline medium.