反应详情

1-(2,2-Difluorobenzo[d][1,3]dioxol-5-yl)cyclopropanecarbonyl chloride (0.878 g, 3.37 mmol) was placed in an oven-dried flask which was allowed to cool under nitrogen. Dichloromethane (10 mL), triethylamine (1.42 mL, 10.1 mmol) and 6-bromo-5-chloropyridin-2-amine (10.1 mmol) were added and the reaction mixture was stirred for 16 hours. The reaction mixture was then washed with a saturated aqueous solution of sodium chloride, evaporated to near dryness, and then purified on 40 g of silica gel utilizing a gradient of 0-30% ethyl acetate in hexanes to yield N-(6-bromo-5-chloropyridin-2-yl)-1-(2,2-difluorobenzo[d][1,3]dioxol-5-yl)cyclopropanecarboxamide (1.01 g, 69%). ESI-MS m/z calc. 429.9. found; 431.3 (M+1)+ Retention time 2.33 minutes.

1. temperatureto cool under nitrogen
2. washThe reaction mixture was then washed with a saturated aqueous solution of sodium chloride
3. customevaporated
4. custompurified on 40 g of silica gel utilizing a gradient of 0-30% ethyl acetate in hexanes