Water → 3-(3'-Ethoxy-4,5-dimethoxybiphenyl-2-ylmethylene)-1,3-dihydroindol-2-one

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Reaction Steps

Tetrakis(triphenylphosphine)palladium(0) (0.02 g, 0.02 mmol) was added to a solution of 3-(3-bromo-4,5-dimethoxybenzylidene)-1,3-dihydroindol-2-one (0.2 g, 0.56 mmol) in toluene (1 ml) and ethanol (1 ml), followed by addition of 2M aqueous sodium carbonate (1 ml, 2mmol). To this mixture was added 3-ethoxyphenylboronic acid (0.1 g, 0.62 mmol) and the mixture was held at 100° C. in a sealed tube for 12 hours. The reaction mixture was then added to water (40 ml) and extracted with ethyl acetate (2×75 ml). The combined organic layers were washed with saturated aqueous sodium bicarbonate (50 ml) and brine (50 ml), dried over magnesium sulfate and concentrated. The resulting solid was triturated with methylene chloride/hexanes to afford 0.14 g (64%) of 3-(3′-ethoxy-4,5-dimethoxybiphenyl-2-ylmethylene)-1,3-dihydroindol-2-one as a yellow/orange solid.

Provenance & Evidence