反应详情

温度

-10 °C

Potassium tert-butoxide (3.94 g, 35.4 mmol) was dissolved in anhydrous DMF (15 ml) and a mixture of 2-benzyloxy-5-nitro-trifluoromethylbenzene (3.5 g, 16.1 mmol) and 4-chlorophenylacetonitrile (2.96 g, 17.7 mmol) in DMF (20 ml) was added over 30 minutes keeping the temperature at −15° C. The mixture was stirred at −10° C. for 1 hour, then poured into 1M hydrochloric acid (150 ml) and the product extracted with dichloromethane (2×100 ml). The organic extracts were dried (MgSO4) and purified by silica column chromatography eluting with dichloromethane/hexane (1/1) to give 5-benzyloxy-2-nitro-4-(trifluoromethyl)phenylacetonitrile (5.2 g, 77%).

1. additionwas added over 30 minutes
2. customat −15° C
3. extractionthe product extracted with dichloromethane (2×100 ml)
4. dry with materialThe organic extracts were dried (MgSO4)
5. custompurified by silica column chromatography
6. washeluting with dichloromethane/hexane (1/1)