反应详情

To a solution of crude N-benzyl-4-methyl-2-(methylamino)thiazole-5-carboxamide (0.040 g, 0.15 mmol), 4-dimethylaminopyridine (catalytical amount) and triethylamine (64 μL, 0.45 mmol) in dichloromethane (5 mL) was added benzoyl chloride (19 μL, 0.17 mmol) at 0° C. and the reaction mixture was allowed to warm to ambient temperature over 18 h. The reaction was quenched by the addition of saturated soldium bicarbonate solution. The mixture was extracted with ethyl acetate. The organic layer was combined, washed with brine, dried over anhydrous magnesium sulphate, filtered and concentrated in vacuo. The crude product was purified by flash column chromatography eluting with ethyl acetate/hexanes (30/70 to 50/50) to afford the title compound (0.040 g, 0.11 mmol); 1H NMR (CDCl3, 400 MHz) δ 7.47-7.35 (m, 5H), 7.30-7.17 (m, 5H), 6.05 (s, 1H), 4.51 (s, J=5.6 Hz, 2H), 3.55 (s, 3H), 2.60 (s, 3H); MS (ES+) m/z 366 (M+1).

1. customThe reaction was quenched by the addition of saturated soldium bicarbonate solution
2. extractionThe mixture was extracted with ethyl acetate
3. washwashed with brine
4. dry with materialdried over anhydrous magnesium sulphate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe crude product was purified by flash column chromatography
8. washeluting with ethyl acetate/hexanes (30/70 to 50/50)