A process for preparing alpha-L-aspartyl-L-phenylalanine alkyl esters from L-aspartic acid of which the amino group is protected by bonding it to a 3,5-dimethoxy-α, α-dimethyl-benzyloxycarbonyl group, then transforming this intermediate into the corresponding anhydride by means of a dehydrating agent, then reacting the anhydride with L-phenylalanine alkyl ester, and finally eliminating the protective group by the action of U.V. radiation.
一种从
L-天冬氨酸制备α-L-天冬
氨酰-
L-苯丙氨酸烷基酯的工艺,其
氨基通过与 3,5-二甲氧基-α,α-二甲基-苄氧羰基键合而受到保护,然后通过脱
水剂将该中间体转化为相应的酸酐,再将该酸酐与
L-苯丙氨酸烷基酯反应,最后通过紫外辐射作用消除保护基。