Water → 1-Ethyl-7-hydroxy-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

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Reaktionsschritte

1.0M-boron tribromide/dichloromethane solution (1.22 ml) was added to a dichloromethane solution (3 ml) of 1-ethyl-7-methoxy-3,3,5-trimethyl-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione (169 mg) at 0° C. The mixture was stirred at room temperature overnight. Water and methanol were added to the reaction mixture, and extraction was performed using a dichloromethane/methanol mixture (dichloromethane:methanol=10:1). The organic layer was dried over anhydrous sodium sulfate, and condensed to dryness under reduced pressure to give the title compound (156.4 mg) as a white powder.

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