申请人:Kuraray Co., Ltd.
公开号:EP1325928A1
公开(公告)日:2003-07-09
A process for preparing pregnane derivatives represented by the formula (V),
which comprises the steps of:
reacting an alkali (earth) metal with a compound represented by the formula (I)
in the presence of ammonia or an amine, to obtain a compound represented by the formula (II);
protecting the hydroxy groups of the obtained compound, to obtain a compound represented by the formula (III);
protecting the 3-position carbonyl group of the obtained compound, to obtain a compound represented by the formula (IV);
and subjecting the obtained compound to solvolysis; and the compound (II).
一种制备式(V)所代表的孕烷衍生物的工艺、
该工艺包括以下步骤
碱(土)金属与式 (I) 所代表的化合物反应
在氨或胺存在下,使碱(土)金属与式 (I) 所代表的化合物反应,得到式 (II) 所代表的化合物;
保护所得化合物的羟基,得到式(III)代表的化合物;
保护所得化合物的 3 位羰基,得到式(IV)代表的化合物;
将得到的化合物进行溶解;得到化合物 (II)。