A green and expedient synthesis of enantiopure diketopiperazines via enzymatic resolution of unnatural amino acids
作者:Pedro C. Pereira、Isabel W.C.E. Arends、Roger A. Sheldon
DOI:10.1016/j.tetlet.2014.06.105
日期:2014.9
Dipeptides comprising a d-phenylglycyl moiety coupled to the l-enantiomer of 2-amino butyric acid, norvaline, norleucine, and homocysteine were successfully synthesized from d-phenylglycine amide and the racemate of the corresponding unnatural amino acid. The reaction is catalyzed by an immobilized form of penicillin G acylase in an aqueous medium. The dipeptides were subsequently converted into the
由d-苯基甘氨酸酰胺和相应的非天然氨基酸的外消旋体成功地合成了包含与2-氨基丁酸,正缬氨酸,正亮氨酸和高半胱氨酸的1-对映异构体偶联的d-苯基甘氨酰基部分的二肽。该反应通过在水性介质中固定化的青霉素G酰基转移酶来催化。随后将二肽转化为相应的对映体纯二酮哌嗪,总分离产率为22-33%。