申请人:Ethyl Corporation
公开号:US04593118A1
公开(公告)日:1986-06-03
2,3-Diaminocarboxylic acid compounds are prepared by (A) nitrosating a .beta.-keto ester to form a 3-keto-2-oximino ester, (B) converting the resultant oxime to a protected 2-amine, (C) reductively aminating the 3-position of the protected 2-amine to form a 2,3-diaminocarboxylic acid ester wherein the 2-amino group is protected, and (D) when desired, treating the 2,3-diaminocarboxylic acid ester to deprotect one or more of the amino and carboxyl groups.
2,3-二氨基羧酸化合物的制备方法为:(A)硝化β-酮酸酯,形成3-酮基-2-肟酯;(B)将得到的肟转化为保护的2-胺基;(C)还原性地氨化保护的2-胺基的3-位,形成2,3-二氨基羧酸酯,其中2-胺基团是保护的;(D)如有需要,处理2,3-二氨基羧酸酯,去除一个或多个氨基和羧基的保护基。