Ethyl 4-(3-[(2,2-di[4-chlorophenyl]-1,3-benzodioxolan-5-yl)methylcarbonyl]indol-1-yl)butanoate 在
乙酸乙酯 、 Brine 、
magnesium sulfate 、 silica 、 dichloromethane ethanol 作用下,
以
acetic acid monohydrate 为溶剂,
反应 1.0h,
以Flash chromatography (silica, eluant=10:1 dichloromethane/ethanol) gave the title compound as a pale tan solid (4.5 g)的产率得到ethyl 4-(3-[(3,4-dihydroxyphenyl)methylcarbonyl]indol-1-yl)butanoate