反应详情

To a round bottomed flask equipped with magnetic stirrer was added (±)-methyl {4-[2,4-bis(methoxymethoxy)phenyl]cyclohexylidene}acetate (1.13 g, 3.23 mmol) and ethanol (50 ml). To the stirred solution was added palladium (catalytic amount, 10% on activated carbon) in one portion. The reaction vessel was evacuated and placed under an atmosphere of hydrogen. This process was repeated for 10 cycles before leaving under a hydrogen atmosphere and then stirred vigorously for 17 hr. The reaction mixture was filtered through celite, washing with ethanol and the filtrate was evaporated to dryness, furnishing the title compound (1.13 g, 99%) as a colourless oil and a mixture of diastereoisomers. δH(CD3OD) 1.53 (2H, m), 1.62-1.78 (2H, m), 1.87 (4H, m), 2.93 (1H, m), 3.47 (3H, s), 3.51 (3H, s), 3.71 and 3.72 (3H, s), 5.16 and 5.17 (2H, s), 5.22 and 5.23 (2H, s), 6.66 and 6.68 (1H, d), 6.79 and 6.80 (1H, s), 7.12 and 7.15 (1H, d).

1. customTo a round bottomed flask equipped with magnetic stirrer
2. customThe reaction vessel was evacuated
3. custombefore leaving under a hydrogen atmosphere
4. filtrationThe reaction mixture was filtered through celite
5. washwashing with ethanol
6. customthe filtrate was evaporated to dryness