(S)-2-((S)-2-Amino-3-benzyloxycarbonyl-propionylamino)-4-methyl-pentanoic acid benzyl ester; compound with trifluoro-acetic acid 、
(2R,3R)-4,4,4-trichloro-3-hydroxy-2-(phenylmethoxycarbonylamino)butanoic acid 在
N-甲基吗啉 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
生成 (S)-2-[(S)-3-Benzyloxycarbonyl-2-((2R,3R)-2-benzyloxycarbonylamino-4,4,4-trichloro-3-hydroxy-butyrylamino)-propionylamino]-4-methyl-pentanoic acid benzyl ester