(4S,4aR,7R,8aS)-4-{(R)-1-Acetoxy-2-[(1S,2S)-1-methoxycarbonyl-2-((R)-1-methoxy-ethyl)-5-oxo-cyclopentyl]-ethyl}-7-(dimethyl-phenyl-silanyl)-4a-ethylsulfanylcarbonyl-2,5-dioxo-decahydro-naphthalene-1-carboxylic acid allyl ester 在
吗啉 、
四(三苯基膦)钯 作用下,
以
四氢呋喃 为溶剂,
反应 16.0h,
以81%的产率得到(1S,2S)-1-{(R)-2-Acetoxy-2-[(1S,4aR,6R,8aR)-6-(dimethyl-phenyl-silanyl)-8a-ethylsulfanylcarbonyl-3,8-dioxo-decahydro-naphthalen-1-yl]-ethyl}-2-((R)-1-methoxy-ethyl)-5-oxo-cyclopentanecarboxylic acid methyl ester