申请人:Kuraray Co., Ltd.
公开号:US05218109A1
公开(公告)日:1993-06-08
Steroid compounds of the following general formulas (I), (II) and (III) are provided: ##STR1## In the above formulas, R.sup.1 and R.sup.2 each is a hydrogen atom or a hydroxyl-protecting group, R is a group of the formula --CH.sub.2 --X (in which X is a substituent such as a hydroxyl group), a carboxyl group or a protected carboxyl group, A.sup.1 is an aryl group, a lower alkyl group or an aralkyl group, and Z.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 each is a hydrogen atom, a hydroxyl group or a protected hydroxyl group. The above steroid compounds are useful as intermediates for the synthesis of vitamin D.sub.3 derivatives having a hydroxyl group at the 1.alpha.-position.
提供以下一般公式(I)、(II)和(III)的类固醇化合物:##STR1## 在上述公式中,R.sup.1和R.sup.2分别是氢原子或羟基保护基团,R是一个具有--CH.sub.2--X(其中X是一个取代基,如羟基)的基团,一个羧基或受保护的羧基,A.sup.1是芳基,低碳基或芳基烷基,Z.sup.1,Z.sup.2,Z.sup.3和Z.sup.4分别是氢原子,羟基或受保护的羟基。上述类固醇化合物可用作合成具有1α-位羟基的维生素D.sub.3衍生物的中间体。