反应详情

To a solution of 6-chloropyrazin-2-amine (1.00 g, 7.72 mmol) in DCM (20 mL) was added acetyl chloride (0.659 mL, 9.26 mmol) at RT and the reaction mixture was stirred for 1 h. The reaction mixture was diluted with water (100 mL) and extracted with DCM (2×100 mL). The combined organic layer was dried over sodium sulfate, filtered and evaporated under reduced pressure to give a residue which was purified by CombiFlash (REDISEP®, silica gel, 12 g, 25% EtOAc/petroleum ether) to give N-(6-chloropyrazin-2-yl)acetamide (0.700 g, 52.9%). LCMS Condition B-39: retention time 1.67 min, [M+1]=170.0. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.14 (s, 3H), 8.47 (s, 1H), 9.29 (s, 1H), 11.09 (br s, 1H).

1. extractionextracted with DCM (2×100 mL)
2. dry with materialThe combined organic layer was dried over sodium sulfate
3. filtrationfiltered
4. customevaporated under reduced pressure
5. customto give a residue which
6. customwas purified by CombiFlash (REDISEP®, silica gel, 12 g, 25% EtOAc/petroleum ether)