The convenient synthesis of 25-hydroxycholesterol (6) is described. 5β-Cholestan-3α, 25-diol (2) derived from lithocholic acid was converted to 6 via four steps : oxidationbromination, dehydrobromination, deconjugation, and reduction. The overall yield of 25-hydroxycholesterol (6) starting from 2 was ca. 50%.
