反应详情

A round bottomed flask equipped with magnetic stirrer was charged with 4-(4-{[tert-butyl(dimethyl)silyl]oxy}phenyl)-1-[2,4-bis(methoxymethoxy)phenyl]cyclohexanol (125 mg, 0.25 mmol), toluene (10 ml) and p-toluene sulfonic acid monohydrate (3 crystals). The reaction mixture was heated to reflux temperature for 30 min, then cooled to room temperature before adding saturated aqueous sodium bicarbonate (5 ml). The layers were separated and the aqueous layer was extracted with ethyl acetate (3×10 ml). The combined organic layers were washed with brine (10 ml), dried over magnesium sulfate, filtered and concentrated in vacuo. The title compound was isolated without further purification as an oil (118 mg, 98%) and a mixture of diastereoisomers. δH(CDCl3) 0.19 (6H, s), 0.98 (9H, s), 1.84 (1H, m), 2.00 (1H, m), 2.27 (1H, m), 2.44 (2H, m), 2.56 (1H, m), 3.48 (3H, s), 3.49 (3H, s), 5.15 (2×2H, s), 5.79 (1H, m), 6.67 (1H, dd), 6.77 (2H, d), 6.78 (1H, d), 7.07 (2H, d), 7.11 (1H, d).

1. customA round bottomed flask equipped with magnetic stirrer
2. temperatureThe reaction mixture was heated
3. temperatureto reflux temperature for 30 min
4. customThe layers were separated
5. extractionthe aqueous layer was extracted with ethyl acetate (3×10 ml)
6. washThe combined organic layers were washed with brine (10 ml)
7. dry with materialdried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo