Ethylene Glycol → 2-(Cholest-5-en-3beta-yloxy)-1-ethanol

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Reaction Steps

A solution of 10 g of cholesterol tosylate and 25.3 g of ethylene glycol in 180 ml of dioxan is heated to 120° C. while stirring. The mixture is then treated with 200 ml of water and extracted with ether. The ethereal phase is washed firstly with 10% sodium carbonate solution and then with water. The organic phase is dried and evaporated. The residue is chromatographed on silica gel while eluting with ether/hexane. There are obtained 5.6 g of 2-(cholest-5-en-3β-yloxy)-1-ethanol, m.p. 92°-95° C., the starting material in Example 2q.

Provenance & Evidence