反应详情

A solution of bromoacetonitrile (2.38 g, 19.86 mmol), benzodioxin-5-ylpiperazine (5.1 g, 19.86 mmol) and triethylamine (11.05 mL, 79.4 mmol) in dimethylformamide (50 mL) was stirred under a nitrogen atmosphere at 70° C. for 3 days. Water (300 mL) was added and the product extracted into ethyl acetate (6×50 mL). The combined organic layers were washed with water (50 mL) and brine (50 mL) and dried over anhydrous sodium sulfate. Filtration and concentration on a rotary evaporator gave the desired compound as a light yellow oil which solidified on standing (5.1 g, 99% yield). The compound was isolated as its hydrochloride salt by treatment in ethyl acetate with ethereal HCl to yield a light yellow solid, mp=193-194° C.; MS (+) ESI m/z=260 (M+H)+.

1. extractionthe product extracted into ethyl acetate (6×50 mL)
2. washThe combined organic layers were washed with water (50 mL) and brine (50 mL)
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationFiltration and concentration
5. customon a rotary evaporator