申请人:KURARAY CO., LTD.
公开号:EP0321572A1
公开(公告)日:1989-06-28
Pregnane derivatives represented by general formula (I) (wherein A1 represents a hydrogen atom or a hydroxy group, A2 represents a substituent such as a hydroxy group when A1 represents a hydrogen atom, or A2 represents a hydrogen atom when A1 represents a hydroxy group, or A1 and A2 are combined together to form an oxo group; 01 represents a substituent such as a hydroxy group, and D2 represents a hydrogen atom, or D1 and D2 are combined together to form an epoxy group or a single bond; D3, D5 and D7 each represents a hydrogen atom, D4 represents a hydroxy group, and D6 represents a substituent such as a hydroxy group, or D3 and D4 may be combined together to form an epoxy group or a single bond, or D4 and D5 may be combined together to form a single bond, D5 and D6 may be combined together to form an epoxy group or a single bond, or D6 and D7 may be combined together to form a single bond; and X1 and X2 each represents a lower alkoxy group or, when combined together, they represent a lower alkylenedioxy or oxo group) and a process for their preparation. The pregnane derivatives are useful as intermediates for synthesizing vitamin D3 having a hydroxy group in the 1α-position.
由通式(I)代表的孕烷衍生物(其中A1代表氢原子或羟基,当A1代表氢原子时A2代表羟基等取代基,或当A1代表羟基时A2代表氢原子,或A1和A2结合在一起形成氧代基;01代表羟基等取代基,D2代表氢原子,或D1和D2结合在一起形成环氧基或单键;D3、D5 和 D7 各自代表氢原子,D4 代表羟基,D6 代表取代基,如羟基,或 D3 和 D4 可结合在一起形成环氧基或单键,或 D4 和 D5 可结合在一起形成单键,D5 和 D6 可结合在一起形成环氧基或单键,或 D6 和 D7 可结合在一起形成单键;X1和X2各自代表一个低级烷氧基,或者当它们结合在一起时,代表一个低级烷二氧基或氧化基团)及其制备方法。孕烷衍生物可作为合成 1α 位具有羟基的维生素 D3 的中间体。