反应详情

Hydrogenation of 21.5 g (42.6 mmol) of 1,5-bis-(4-benzyloxy-3-methoxy-phenyl)-penta-1,4-dien-3-one prepared in Example D was effected as described in General Method 3 using 1.0 g 5% Pd over BaSO4 and 600 mL of THF under hydrogen atmosphere. The product contained both ketone and alcohol. Therefore, the mixture was dissolved in acetone (approximately 500 mL), treated with 20 mL of 8.0N Jones reagent, and stirred overnight at room temperature. Isopropanol was added, and the mixture was filtered through Celite. The filtrate was concentrated, and the residue was triturated with 1:1 hexane:EtOAc to give the title compound. 1H NMR (DMSO-d6) δ 2.71 (m, 8 H), 3.74 (s, 6 H), 5.02 (s, 4 H), 6.66 (m, 2 H), 6.82 (br s, 2 H), 6.87 (m, 2 H), 7.29-7.43 (m, 10 H).

1. filtrationthe mixture was filtered through Celite
2. concentrationThe filtrate was concentrated
3. customthe residue was triturated with 1:1 hexane