| abstract |
(57) [Summary] (Modified) [Objective] To provide a synthetic intermediate of 1α, 25-dihydroxy-26-homovitamin D 3 . [Structure] (25ξ) -1α, 3 having the general formula on the left β, 25-trihydroxy-26-homocholester 5, 7-diene compound. Represent R 4, R 5 is a hydrogen atom; wherein, R 1, R 2, R 3 is a hydrogen atom, C 1 to 4 acyl group, Benzoru group. Or R 4 and R 5 together form a C = C bond] [Effect] This compound is 1α, 25-dihydroxy-26. -Used as a synthetic intermediate for homovitamin D 3 (general formula in the right figure). |