反应详情

In ethanol (50 mL) was dissolved sodium metal (1.6 g, 66 mmol) at 23° C. 2-Methylbenzenethiol (8.1 mL, 68 mmol) was slowly added to this solution, followed by bromoacetaldehyde diethylacetal (9.50 mL, 63 mmol). The reaction mixture was stirred at reflux for 18 h. The solvent was then evaporated in vacuo and the residue was washed with H2O (100 mL) and extracted with ether (100 mL). The organic solution was dried (MgSO4), concentrated in vacuo and purified by distillation to afford the title compound (13.48 g, 82% yield): 1H NMR (400 MHz, CDCl3) δ ppm: 7.33 (1H, d, J=7.9 Hz), 7.16-7.08 (3H, m), 4.65 (1H, t, J=5.6 Hz), 3.66 (2H, q, J=7.0 Hz), 3.55 (2H, q, J=7.0 Hz), 3.09 (2H, d, J=5.6 Hz), 2.38 (3H, s), 1.20 (6H, t, J=7.0 Hz). LCMS (M+H)+ m/z 241 (t=2.65min.).

1. temperatureat reflux for 18 h
2. customThe solvent was then evaporated in vacuo
3. washthe residue was washed with H2O (100 mL)
4. extractionextracted with ether (100 mL)
5. dry with materialThe organic solution was dried (MgSO4)
6. concentrationconcentrated in vacuo
7. distillationpurified by distillation