L-Phenylalanine, N-[(1,1-dimethylethoxy)carbonyl]-L-tryptophylglycyl-,methyl ester 在
N,N-二异丙基乙胺 、
3-(二乙氧基邻酰氧基)-1,2,3-苯并三嗪-4-酮 barium dihydroxide 、 benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
甲醇 、
乙腈 为溶剂,
生成
(2S,3R)-2-Benzyloxycarbonylamino-3-((S)-2-{2-[(S)-2-tert-butoxycarbonylamino-3-(1H-indol-3-yl)-propionylamino]-acetylamino}-3-phenyl-propionyloxy)-butyric acid methyl ester