Steroid derivatives useful as the intermediate for preparing vitamin D derivatives such as 1α, 25-dihydroxyvitamin D3 and 2β-(3-hydroxypropoxy)-1α, 25-dihydroxyvitamin D3, i.e., halides of general formula (II) (wherein X is bromo or iodo); 1,4,6-trien-3-one compounds of general formula (III) (wherein X is as defined above); 1,3,5,7-tetraene compounds of general formula (IV) (wherein X is as defined above; and R1 is acyl); and 1,5,7-triene compounds of general formula (V) (wherein X is as defined above; and R2 is hydrogen or a hydroxyl-protecting group); and processes for the preparation of the same.
可用作制备
维生素 D 衍
生物如 1α,25-二羟基
维生素 D3 和 2β-(3-羟基丙氧基)-1α,25-二羟基
维生素 D3 的中间体的类
固醇衍
生物,即通式(II)的卤化物(其中 X 为
溴或
碘);通式(III)的 1,4,6-
三烯-3-酮化合物(其中 X 如上所定义);通式(IV)的 1,3,5,7-四烯化合物(其中 X 如上所定义;R1 为酰基);以及通式(V)的 1,5,7-
三烯化合物(其中 X 如上所定义;R2 为氢或羟基保护基);以及制备上述物质的工艺。