反应详情

温度

0 °C

A suspension of a 60 % sodium hydride (0.531 g) in tetrahydrofuran (100 ml) is cooled to 0° C., and 17-(methoxymethoxy)-estra-1,3,5(10)-trien-3-ol (3.5 g) is slowly added thereto. After addition of dimethylformamide (50 ml), the mixture is stirred at room temperature for 2 hours. To the resulting solution is added 1,3-dibromo-propane (2.68 g), and the mixture is stirred at room temperature overnight. The reaction mixture is poured into an aqueous ammonium chloride, followed by extraction with ethyl acetate. The solvent is removed under reduced pressure and the residue thus obtained is purified over column chromatography (n-hexane:ethyl acetate=2:1) to give 3-[(3-bromopropyl)oxy]- 17-(methoxymethoxy)-estra-1,3,5(10)-triene (3.0 g).

1. stirringthe mixture is stirred at room temperature overnight
2. extractionfollowed by extraction with ethyl acetate
3. customThe solvent is removed under reduced pressure
4. customthe residue thus obtained
5. customis purified over column chromatography (n-hexane:ethyl acetate=2:1)