反应详情

温度

0 °C

To a solution of N*1*-Benzyl-3-benzyloxy-benzene-1,2-diamine (4.60 g, 15.11 mmol) in 100 mL dichloromethane at 0° C. was added triethylamine (4.201 mL, 30.22 mmol) followed by portionwise addition of triphosgene (1.57 g, 5.29 mmol). The resulting solution was stirred for 2 hours at 0° C. The reaction mixture was allowed to warm to room temperature and was then added to 200 mL water. The organic phase was separated, washed with 100 mL 10% aqueous HCl, 100 mL saturated aqueous sodium bicarbonate, and 100 mL brine, dried over sodium sulfate, and concentrated in vacuo to give 4.60 g (13.92 mmol, 92%) of 1-benzyl-4-benzyloxy-1,3-dihydro-benzoimidazol-2-one as a tan solid. MS: 331 (M+H)+.

1. temperatureto warm to room temperature
2. customThe organic phase was separated
3. washwashed with 100 mL 10% aqueous HCl, 100 mL saturated aqueous sodium bicarbonate, and 100 mL brine
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated in vacuo