反应详情

The title compound was prepared as described in General Method 8 using the following: 5,6-dihydro-4-hydroxy-6-(3-methylbutyl)-6-phenyl-2H-pyran-2-one (0.300 g, 1.15 mmol), Et3N (0.17 mL, 1.2 mmol), 2-isopropylbenzoyl chloride (1.15 mmol), CH2Cl2 (4.0 mL), acetonitrile (4.0 mL), acetone cyanohydrin (0.05 mL, 0.5 mmol), Et3N (0.35 mL, 2.5 mmol), glacial acetic acid (5.0 mL), sodium cyanoborohydride (0.50 g, 8.1 mmol). Purification was achieved by submitting the final residue to column chromatograpy (SiO2, 100% CH2Cl2) to provide a solid (0.118 g, 124°-126° C.). 1H NMR (400 MHz, DMSO-d6) δ10.855 (bs, 1H), 7.395-7.306 (m, 5H), 7.115 (dd, 1H, J=1 Hz, J=7.5 Hz), 6.991 (t, 1H, J=7 Hz), 6.622 (td, 1H, J=1 Hz, J=7 Hz), 6.123 (d, 1H, J=7 Hz), 3.422 (s, 2H), 3.210-3.102 (m, 3H), 1.975-1.871 (m, 2H), 1.437-1.371 (m, 1H), 1.142-1.084 (m, 7H), 0.938-0.807 (m, 1H), 0.791-0.766 (m, 6H).

1. customPurification
2. customto provide a solid (0.118 g, 124°-126° C.)