反应详情

To a suspension of ethyl 4-methyl-2-(5-oxo-1H-1,2,4-triazol-4(5H)-yl)thiazole-5-carboxylate (0.25 g, 0.98 mmol) and potassium carbonate (0.20 g, 1.47 mmol) in acetone (20 mL) was added 2-cyclopropylethyl 4-methylbenzenesulfonate (0.28 g, 1.18 mmol). The reaction mixture was heated to reflux for 24 hours, cooled to ambient temperature and filtered. The filtrate was concentrated in vacuo to afford ethyl 2-(1-(2-cyclopropylethyl)-5-oxo-1H-1,2,4-triazol-4(5H)-yl)-4-methylthiazole-5-carboxylate in 63% yield (0.20 g): MS (ES+) m/z 323.3 (M+1).

1. temperatureThe reaction mixture was heated
2. temperatureto reflux for 24 hours
3. filtrationfiltered
4. concentrationThe filtrate was concentrated in vacuo