Water → HCID 22795163, compound

Participants

Reaction Steps

21-Chloromethyl-3α-hydroxy-5α-pregnane-11,20-dione (600 mg) in acetone was treated at reflux with potassium phthalimide (600 mg) for 10 hours, poured into water and the oily precipitate extracted into ether. The extracts were washed with water, dried over anhydrous sodium sulphate and evaporated to a white foam (700 mg). Purification by preparative t.l.c. in ethyl acetate/petrol (1:1) gave a foam which on trituration with ether gave title compound (490 mg) as a white solid m.p. 187°-189° [α]D + 58.8° (c = 0.97).

Provenance & Evidence