1-(2,4-dimethoxyphenyl)-2-(3',4'-dimethoxyphenyl)-1-oxo-3-ethoxy-propane 、
三溴化硼 以
二氯甲烷 为溶剂,
反应 72.0h,
以Workup and chromatography of the reaction product afforded 1-(2,4-dihydroxyphenyl)-2-(3′,4′-dihydroxyphenyl)-1-oxo-2-propene as the minor product and 1-(2,4-dihydroxyphenyl)-2-(3′,4′-dihydroxyphenyl)-1-oxo-3-bromo-propane as the major product的产率得到3'-hydroxy-O-demethyldehydroangolensin