反应详情

2-Methoxy-6-methylsulfanyl-4-trifluoromethyl-N-(1,4,8-trioxa-spiro[4.5]dec-6-yl)-benzamide (intermediate B, 200 mg, 0.49 mmol) was dissolved in 1 mL tetrahydrofuran and 1 mL 4N HCl in dioxane was added. The reaction mixture was refluxed for 2 h. The mixture was diluted with water, ethyl acetate and neutralized with saturated sodium bicarbonate solution. The mixture was extracted two times with ethyl acetate. The combined organic layers were dried with sodium sulfate, filtered and evaporated. The crude product was used for the next step.

1. temperatureThe reaction mixture was refluxed for 2 h
2. extractionThe mixture was extracted two times with ethyl acetate
3. dry with materialThe combined organic layers were dried with sodium sulfate
4. filtrationfiltered
5. customevaporated