Nucleophilic substitution of the halogen atom in dimethyl (S)-4-bromoglutamate followed by removal of the protecting groups and closure of a lactam ring afforded (2S,4S)-4-(indolin-1-yl)-5-oxoproline. The indoline fragment was oxidized into the indole fragment to give (2S,4S)-4-(indol-1-yl)-5-oxoproline; reduction of the carbonyl groups with BH3 yielded (2S,4S)-4-(indol-1-yl)prolines and (2S,4S)-2
(S)-4-
溴谷氨酸二甲酯中卤素原子的亲核取代,然后去除保护基团并关闭内酰胺环,得到 (2S,4S)-4-(indolin-1-yl)-5-oxoproline。将二氢
吲哚片段氧化成
吲哚片段,得到(2S,4S)-4-(
吲哚-1-基)-5-氧代脯
氨酸;用
BH3 还原羰基产生 (2S,4S)-4-(indol-1-yl) 脯
氨酸和 (2S,4S)-2-羟甲基-4-(indol-1-yl)
吡咯烷。研究了 (2S,4S)-4-arylamino-5-oxoprolines 用 还原成相应的 (2S,4S)-4-arylaminoproline 和 (2S,4S)-4-arylamino-2-hydroxymethylpyrrolidines。