Process for the preparation of L-aspartic acid N-thiocarboxyanhydride
申请人:Pfizer Inc.
公开号:US04256897A1
公开(公告)日:1981-03-17
An improved process for the preparation of L-aspartic acid N-thiocarboxyanhydride by the reaction of a 0.75 to 1.25 molar solution of an N-alkoxy-thiocarbonyl L-aspartic acid in a lower alkyl acetate solvent with a phosphorous trihalide. The desired product is substantially insoluble in the lower alkyl acetate solvent and is recovered in pure form without further purification or separation steps.