、
benzyl 4-[(1S)-1-[[4-[(1S)-1-aminoethyl]-2-methyl-1,3-thiazole-5-carbonyl]amino]-2-phenylethyl]-2-methyl-1,3-thiazole-5-carboxylate 在
1-羟基苯并三唑 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
反应 4.5h,
以93 mg的产率得到4-[(1S)-1-[[[4-[(1S)-1-[[[4-[(1S)-1-[[9H-fluoren-9-ylmethoxy(hydroxy)methylidene]amino]ethyl]-2-methyl-1,3-thiazol-5-yl]-hydroxymethylidene]amino]-2-phenylethyl]-2-methyl-1,3-thiazol-5-yl]-hydroxymethylidene]amino]ethyl]-N-[(1S)-1-[5-[C-hydroxy-N-[(1S)-1-[5-[C-hydroxy-N-[(1S)-1-(2-methyl-5-phenylmethoxycarbonyl-1,3-thiazol-4-yl)-2-phenylethyl]carbonimidoyl]-2-methyl-1,3-thiazol-4-yl]ethyl]carbonimidoyl]-2-methyl-1,3-thiazol-4-yl]-2-phenylethyl]-2-methyl-1,3-thiazole-5-carboximidic acid