methyl 3-{[N2-(tert-butoxycarbonyl)-L-ornithyl]amino}-3-deoxy-1,2-O-(1-methylethylidene)-α-D-xylofuranoate 、
3-{[N2-(tert-butoxycarbonyl)-N5-(phenoxycarbonyl)-L-ornithyl]amino}-3-deoxy-1,2-O-(1-methylethylidene)-α-D-xylofuranoic acid 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 24.0h,
以81%的产率得到methyl (3aR,5S,6R,6aR)-6-{[(2S)-2-[(tert-butoxycarbonyl)amino]-5-({[(3aR,5S,6R,6aR)-6-({(2S)-2-[(tert-butoxycarbonyl)amino]-5-[(phenoxycarbonyl)amino]pentanoyl}amino)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl]carbonyl}amino)pentanoyl]amino}-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxole-5-carboxylate