反应详情

To a solution of ethyl 4-fluoro-5-(4-(trifluoromethyl)phenyl)isoxazole-3-carboxylate (147 mg, 0.48 mmol) in tetrahydrofuran (2.5 mL) was added a solution of lithium hydroxide (20 mg, 0.83 mmol) in water (2.5 mL). After stirring for one hour, the reaction mixture was acidified to pH=2 with 1M HCl, and extracted three times with dichloromethane. The dichloromethane extracts were combined, dried over sodium sulfate and rotoevaporated to obtain the title compound (130 mg, 0.47 mmol).

1. extractionextracted three times with dichloromethane
2. dry with materialdried over sodium sulfate