反应详情

4,4-Dibenzyl-1,7-diphenyl-1, 6-heptadiene-3,5-dione (12b, 70 mg, 0.2 mmol) and palladium on activated carbon (0.10 g, 10%) were combined in ethyl acetate (25 ml). The mixture was placed under a hydrogen atmosphere (60 psi) on a Parr apparatus for 5 hr at room temperature. The resulting mixture was filtered through celite and the filtrate was washed with saturated sodium chloride, dried over magnesium sulfate, filtered and evaporated to afford a solid. The crude solid was chromatographed on silica gel with ethyl acetate/hexane to give a solid. The solid was recrystallized from hexane to give 60 mg (86%) of a white solid: mp 101-102° C. [expected mp 100.5-101.5° C.]; 1H NMR: δ 2.56 (t, 4H, J=7.4 Hz), 2.74 (t, 4H, J=6.8 Hz), 3.29 (s, 4H), 7.04 (m, 20H); 13C NMR: δ 29.6, 37.3, 42.5, 71.1, 126.1, 126.8, 128.4, 129.6, 136.0, 140.6, 207.8; Anal. Calcd for C33H32O2: C, 86.05; H, 7.00. Found: C, 86.28; H, 7.11.

1. customfor 5 hr
2. customat room temperature
3. filtrationThe resulting mixture was filtered through celite
4. washthe filtrate was washed with saturated sodium chloride
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. customevaporated
8. customto afford a solid
9. customThe crude solid was chromatographed on silica gel with ethyl acetate/hexane
10. customto give a solid
11. customThe solid was recrystallized from hexane