反应详情

温度

0 °C

1.9 g. of diphenyldiselenide is dissolved in 100 ml. of absolute ethanol and combined at room temperature with 500 mg. of sodium borohydride. After decolorization of the yellow solution, 2.5 g. of 16α,17α-epoxy-3-methoxy-1,3,5(10)-estratriene [B. Schoenecker et al., Z.Chem [Chemical News] 10 (6), (1910)] is added thereto, and the mixture is heated for 27 hours under reflux. After cooling to 0° C., 6 ml. of 30% H2O2 is added dropwise thereto, and the solution is gradually warmed to 50° C. After 2 hours, the solution is poured into ice water. The thus-precipitated product is vacuum-filtered, washed with water, taken up in methylene chloride, and dried over sodium sulfate. After the crude product has been chromatographed on silica gel with 5 - 7.5% acetone/hexane, 1.1 g. of 3-methoxy-1,3,5(10),15-estratetraen-17α-ol is isolated as an oily product.

1. customcombined at room temperature with 500 mg
2. temperaturethe mixture is heated for 27 hours
3. temperatureunder reflux
4. temperaturethe solution is gradually warmed to 50° C
5. filtrationThe thus-precipitated product is vacuum-filtered
6. washwashed with water
7. dry with materialdried over sodium sulfate
8. customAfter the crude product has been chromatographed on silica gel with 5 - 7.5% acetone/hexane, 1.1 g