反应详情

温度

45 °C

To a dry flask containing (R,R)—N-[3-(4-hydroxyphenyl)-4-methylisothiazol-5-yl]-2-methylcyclopropanecarboxamide (100 mg, 0.347 mmol) is added dry acetone (2 mL), K2CO3 (50 mg, 0.347 mmol), and methyl iodide (19 μL, 0.313 mmol). The reaction mixture is heated 16 h at 45° C. and treated with additional methyl iodide (19 μL, 0.313 mmol). After heating for another 6 h, the solvent is evaporated, and the residue is partitioned between ethyl acetate and water. The ethyl acetate solution is washed (satd aqueous K2CO3 (twice) and brine), dried (MgSO4), and the solvent evaporated. Chromatography over silica gel, eluting with EtOAc/hexanes, affords (R,R)—N-[3-(4-methoxyphenyl)-4-methylisothiazol-5-yl]-2-methylcyclopropane-carboxamide (35 mg, 33%) as a white solid. 1H NMR; ES-MS: m/e 303 (m+1).

1. temperatureAfter heating for another 6 h
2. customthe solvent is evaporated
3. customthe residue is partitioned between ethyl acetate and water
4. washThe ethyl acetate solution is washed (
5. dry with materialdried (MgSO4)
6. customthe solvent evaporated
7. washChromatography over silica gel, eluting with EtOAc/hexanes