22-Arylsulfonyl-24,25-dihydroxycholestanes and process for preparing the same.

摘要

24,25-Dihydroxycholestane derivatives of the formula …… wherein A is a steroid residue and R is an aryl group and a process for preparation of the same are disclosed. The derivatives are intermediates for synthesis of 24,25-dihydroxycholecalciferol having useful physicological activity like that of vitamin D3. 24,25-Dihydroxycholecalciferol can be produced in an industrially advantageous method via the intermediates which are easily prepared from commercially available starting compounds.