作者:B. Yde、I. Thomsen、M. Thorsen、K. Clausen、S.-O. Lawesson
DOI:10.1016/s0040-4020(01)88631-2
日期:1983.1
The protected aspartame, 4, has been prepared from the benzyl ester of N-benzyloxycarbonyl-S-aspartic acid, 1, and the methyl S-phenylalanate, 3, using 2,4-bis(4-methoxyphenyl)-1, 3,2,4-dithiadiphosphetane 2,4-disulfide, LR, as a coupling reagent. Another protected aspartame, 7, has been prepared from the tert-butyl ester of 1-[N-benzyloxycarbonyl-α-S-aspartyloxyl]-succinimide, 6, and methyl S-phenylalanate
使用2,4-双(4-甲氧基苯基)-1,3,由N-苄氧基羰基-S-天冬氨酸的苄酯和S-苯丙氨酸甲酯3制备受保护的阿斯巴甜4, 2,4-二硫代二膦2,4-二硫化物LR,作为偶联剂。由1- [N-苄氧基羰基-α-S-天冬氨酰]-琥珀酰亚胺的叔丁基酯6和S-苯丙氨酸甲酯3制备了另一种受保护的阿斯巴甜7。受保护的硫天冬氨酸5/9。7和9的脱保护基可以高收率得到8个阿斯巴甜和10个有点甜的硫代阿斯巴甜。