反应详情

温度

90 °C

To a suspension of hydroxylamine hydrochloride (146 mg) and sodium acetate (172 mg) in 2-propanol (4 ml) was added N-(4-methyl-5-(4-methylpyridin-2-yl)thiazol-2-yl)-S-ethylisothiourea (205 mg), and the mixture was stirred at 90° C. for 1 hour. The mixture was diluted with ethyl acetate and washed with water and brine. The organic layer was dried over sodium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography (silica gel, 3 to 4% methanol in dichloromethane) to give N-(4-methyl-5-(4-methylpyridin-2-yl)thiazol-2-yl)-N′-hydroxyguanidine (81 mg).

1. washwashed with water and brine
2. dry with materialThe organic layer was dried over sodium sulfate
3. customevaporated under reduced pressure
4. customThe residue was purified by column chromatography (silica gel, 3 to 4% methanol in dichloromethane)