A process for preparing pregnane derivatives represented by the formula (V),
1
which comprises the steps of:
reacting an alkali (earth) metal with a compound represented by the formula (I)
2
in the presence of ammonia or an amine, to obtain a compound represented by the formula (II);
3
protecting the hydroxy groups of the obtained compound, to obtain a compound represented by the formula (III);
4
protecting the 3-position carbonyl group of the obtained compound, to obtain a compound represented by the formula (IV);
5
and subjecting the obtained compound to solvolysis; and the compound (II).
一种制备以公式(V)表示的孕烷衍
生物的方法,包括以下步骤:在
氨或胺的存在下,将以公式(I)表示的化合物与碱
金属(碱土
金属)反应,得到以公式(II)表示的化合物;保护所得化合物的羟基,得到以公式(III)表示的化合物;保护所得化合物的3位置羰基基团,得到以公式(IV)表示的化合物;将所得化合物进行溶剂解离反应;以及化合物(II)。