反应详情

A mixture of propargyl benzenesulfonate (1.0 g, 5.1 mmol), m-cresol (0.55 mL, 5.1 mmol) and potassium carbonate (1.1 g, 7.65 mmol) in acetone (40 mL) was stirred at about 56 C for about 2 days. The mixture was cooled, filtered and the solvent was carefully distilled off at atmospheric pressure. The residue was purified by flash chromatography on silica gel using diethyl ether/n-pentane (1:9) as eluent to provide Example 614. 1H NMR (500 MHz, CDCl3): □ 2.33 (s, 3H), 2.50 (t, J=3.0 Hz, 1H), 4.66 (d, J=3.0 Hz, 2H), 6.77-6.82 (m, 3H), 7.15-7.21 (m, 1H).

1. temperatureThe mixture was cooled
2. filtrationfiltered
3. distillationthe solvent was carefully distilled off at atmospheric pressure
4. customThe residue was purified by flash chromatography on silica gel
5. customto provide Example 614