(S)-2-(3-azido-2,2-dimethylpropanoyloxy)-4-methylpentanoic acid chloride 、
(R)-3-(3-Chloro-4-methoxy-phenyl)-2-[(E)-(5S,6S)-6-((4R,5R)-2,2-dimethyl-5-phenyl-[1,3]dioxolan-4-yl)-5-hydroxy-hept-2-enoylamino]-propionic acid 2,2,2-trichloro-ethyl ester 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 1.17h,
以160 mg的产率得到[(E,2S,3S)-7-[[(2R)-3-(3-chloro-4-methoxyphenyl)-1-oxo-1-(2,2,2-trichloroethoxy)propan-2-yl]amino]-2-[(4R,5R)-2,2-dimethyl-5-phenyl-1,3-dioxolan-4-yl]-7-oxohept-5-en-3-yl] (2S)-2-(3-azido-2,2-dimethylpropanoyl)oxy-4-methylpentanoate