[(8S,11S,14S)-14-[(tert-butoxycarbonyl)amino]-11-{3-[(tert-butoxycarbonyl)amino]propyl}-17-hydroxy-10,13-dioxo-9,12-diazotricyclo[14.3.1.12,6]henicosa-1(20),2(21),3,5,16,18-hexaen-8-yl]acetic acid 、
tert-butyl [(4S)-4-amino-6-({(2S)-2,5-bis[(tert-butoxycarbonyl)amino]pentyl}amino)-6-oxohexyl]carbamate 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
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
以38%的产率得到tert-butyl [(4S)-6-({(2S)-2,5-bis[(tert-butoxycarbonyl)amino]pentyl}amino)-4-({[(8S,11S,14S)-14-[(tert-butoxycarbonyl)amino]-11-{3-[(tert-butoxycarbonyl)amino]propyl}-17-hydroxy-10,13-dioxo-9,12-diazatricyclo[14.3.1.12,6]henicosa-1(20),2(21)3,5,16,18-hexaen-8-yl]acetyl}amino)-6-oxohexyl]carbamate