反应详情

温度

0 °C

A solution of cesium carbonate (0.57 g, 1.8 mmol) in N,N-dimethylformamide (1.8 mL) at 0° C. was treated with (3-nitrophenyl)methanethiol (0.22 mL, 1.6 mmol) dropwise and stirred at 0° C. for 10 min. The reaction mixture was treated with a solution of 3-[(tert-butoxycarbonyl)amino]benzyl methanesulfonate (0.41 g, 1.3 mmol) in N,N-dimethylformamide (2.4 mL) dropwise and stirred at 0° C. for 30 min. The reaction mixture was diluted with ethyl acetate (50 mL) and washed with water (40 mL) and brine (20 mL). The organic layer was separated, dried over anhydrous sodium sulfate, filtered, and evaporated to a crude brown oil. This material was purified by flash column chromatography to give the desired product (0.42 g, 84% for 2 steps) as a yellow oil. LCMS for C19H22N2O4SNa (M+Na)+: m/z=396.7.

1. stirringstirred at 0° C. for 30 min
2. washwashed with water (40 mL) and brine (20 mL)
3. customThe organic layer was separated
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. customevaporated to a crude brown oil
7. customThis material was purified by flash column chromatography