Boron tribromide → HCID 178431721, compound

Participants

Reaction Steps

To a solution of 3-methoxy-4-methyl-2,5-dioxo-2,5-dihydro-1H-benz[b]azepine (0.47 g) in dichloromethane was added boron tribromide (6.5 mL). The precipitate which formed was diluted with water and extracted with ethyl acetate. The combined organic extracts were washed with brine, dried and evaporated. The solid was recrystallized from hot toluene to give the title compound (0.31 g); mp 252.3° C.; NMR: 2.07 (s,3); MS(EI): m/z=203(M). Analysis for C11H9NO3 ·0.2 H2O: Calculated: C, 63.89; H, 4.58; N, 6.77; Found: C, 63.79; H, 4.49; N, 6.73.

Provenance & Evidence