(8S,11S,14S)-14-[(tert-butoxycarbonyl)amino]-11-{3-[(tert-butoxycarbonyl)amino]propyl}-17-hydroxy-9-methyl-10,13-dioxo-9,12-diazatricyclo[14.3.1.12,6]-henicosa-1(20),2(21),3,5,16,18-hexaene-8-carboxylic acid 、
N2-(tert-butoxycarbonyl)-N-{2-[(tert-butoxycarbonyl)amino]ethyl}-L-ornithinamide 、
1,2-二氯乙烷 、
1-羟基苯并三唑 在
crude product 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
生成 tert-Butyl (2-{[(2S)-2-[(tert-butoxycarbonyl)amino]-5-({[(8S,11S,14S)-14-[(tert-butoxycarbonyl)amino]-11-{3-[(tert-butoxycarbonyl)amino]propyl}-17-hydroxy-9-methyl-10,13-dioxo-9,12-diazatricyclo[14.3.1.12,6]henicosa-1(20),2(21),3,5,16,18-hexaen-8-yl]carbonyl}amino)pentanoyl]amino}ethyl)carbamate