反应详情

To a solution of N-(3-cyanothiophen-2-yl)-2-(4-methoxyphenyl)acetamide (234 mg, 0.859 mmol) in a mixture of ethanol (5 mL), methylene chloride (0.5 mL) and triethylamine (202 μL, 1.46 mmol) was added hydroxylamine hydrochloride (90 mg, 1.29 mmol). The resulting solution was stirred at room temperature for 18 h and was subsequently diluted with saturated aqueous sodium bicarbonate and extracted with ethyl acetate. The organic phases were combined, dried (Na2SO4), filtered, concentrated under vacuum and purified on a silica gel column (eluant hexane/ethyl acetate, 7/3 to 2/8) to give N-(3-(N′-hydroxycarbamimidoyl)thiophen-2-yl)-2-(4-methoxyphenyl)acetamide. Retention time (min)=1.161, method [1], MS(ESI) 306.1 (M+H).

1. extractionextracted with ethyl acetate
2. dry with materialdried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated under vacuum
5. custompurified on a silica gel column (eluant hexane/ethyl acetate, 7/3 to 2/8)