反应详情

温度

40 °C

The title compound was prepared as described in General Method 7 using the following: 5,6-dihydro-4-hydroxy-6-phenyl-6-(2-phenylethyl)-2H-pyran-2-one (0.250 g, 0.850 mmol), 2,5-dimethylbenzyl-p-toluenethiosulfonate (0.312 g, 1.02 mmol), Et3N (0.230 mL, 1.60 mmol), NaHCO3 (0.071 g, 0.85 mmol), absolute ethanol (3.0 mL). The mixture was heated to 40° C. for 16 h then diluted with diethyl ether (100 mL), and washed with H2O. The solvent was then removed in vacuo and the residue submitted to column chromatography (SiO2, 100% CH2Cl2 to 2% methanol in CH2Cl2) to provide a solid (0.116 g, m.p. 54°-56° C.) which was dried in vacuo. 1H NMR (400 MHz, DMSO-d6) δ11.498 (bs, 1H), 7.405-7.380 (m, 4H), 7.327-7.285 (m, 1H), 7.258-7.221 (m, 2H), 7.168-7.128 (m, 1H), 7.090 (d, 2H, J=7.5 Hz), 6.970 (d, 1H, J=8 Hz), 6.890 (d, 1H, J=8 Hz), 6.821 (s, 1H), 3.600 (d, 1H, J=11 Hz), 3.505 (d, 1H, J=11 Hz), 3.250 (d, 1H, J=17 Hz), 3.176 (d, 1H, J=17), 2.619-2.564 (m, 1H), 2.235-2.168 (m, 9H).

1. washwashed with H2O
2. customThe solvent was then removed in vacuo