Cyanogen Bromide → HCID 67311166, compound

Participants

Reaction Steps

To a solution of methyl 3-(4-amino-3-hydroxyphenoxy)benzoate (13.1 g, 50.5 mmol) in tetrahydrofuran (200 mL) was added cyanogen bromide (9.76 g, 92.1 mmol), and the mixture was stirred at room temperature for 16 hr. To the reaction mixture was added cyanogen bromide (1.78 g, 16.8 g), and the mixture was further stirred at room temperature for 3 days. The reaction mixture was diluted with ethyl acetate (300 mL), washed with saturated aqueous sodium hydrogencarbonate solution (150 mL×2) and saturated brine (150 mL), successively, and dried over anhydrous magnesium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure to give the title compound (13.6 g, yield (total of 4 steps) 95%) as brown crystals.

Provenance & Evidence