Reaction of 3β-mesyloxycholestane-5α, 6β-diol 6-monoacetate (1 e) with potassium t- butoxide gave the 3α, 5α-oxycholestan-6β-ol (4 a), which rearranged further to 5β, 6β- epoxycholestan-3-ol (5). Treatment of 1 c with triethylamine gave cholest-2-ene-5α, 6β-diol diacetate (7 a), whereas heating diacetate 1 c in pyridine-dimethylformamide gave cholestan-3α, 5α, 6β-triol 3, 6-diacetate (2 a). Cholest-2-ene-5α, 6β-diol diacetate (7 a) ...
