Ammonium Hydroxide → 1H-Inden-1-one, 3-amino-5-hydroxy-2-(4-hydroxyphenyl)-

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Reaction Steps

Boron tribromide (0.5 mL, 5.3 mmol) was added dropwise into a cold (−78° C.) mixture of 3-Amino-5-methoxy-2-(4-methoxyphenyl)-1H-inden-1-one (250 mg, 0.89 mmol), and dichloromethane (2.0 mL). The reaction mixture was allowed to come gradually to room temperature and stirred for 1 hour. The mixture was poured onto ice containing ammonium hydroxide (1 mL) and extracted with ethyl acetate. The organic extracts were washed with brine and were dried over MgSO4. Evaporation and flash chromatography (5%-10% ETOH/dichloromethane) gave (126 mg, 56% yield) of the product as a purple solid: mp 260-265° C.;

Provenance & Evidence