反应详情

Demethylation was effected in the same as in Example 2 with N-(3-chlorophenyl)-2-cyano-3-(3-fluoro-4-hydroxy-5-methoxyphenyl) propenamide (470 mg, 1.36 mmol) and 1M solution of boron tribromide in methylene chloride (3.50 ml, 34.50 mmol). The resulting solid was recrystallized from ethanol-water to give the objective N-(3-chlorophenyl)-2-cyano-3-(3-fluoro-4, 5-dihydroxyphenyl) propenamide (160 mg, 35% in yield) as yellow powder.

1. customThe resulting solid was recrystallized from ethanol-water