(6R,10S,13S)-6-(3-chloro-4-methoxybenzyl)-13-isobutyl-2,2-dimethyl-10-(2-(methylthio)ethyl)-4,8,11-trioxo-3-oxa-5,9,12-triazatetradecan-14-oic acid 、
(2E,7E)-(5S,6R)-5-Hydroxy-6-methyl-8-phenyl-octa-2,7-dienoic acid tert-butyl ester 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以50%的产率得到(6R,10S,13S)-((1E,3R,4S,6E)-8-tert-butoxy-3-methyl-8-oxo-1-phenylocta-1,6-dien-4-yl)-6-(3-chloro-4-methoxybenzyl)-13-isobutyl-2,2-dimethyl-10-(2-(methylthio)ethyl)-4,8,11-trioxo-3-oxa-5,9,12-triazatetradecan-14-oate