Process for the preparation of pregnane derivatives
申请人:——
公开号:US20030181742A1
公开(公告)日:2003-09-25
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).
PROCESS FOR THE PREPARATION OF PREGNANE DERIVATIVES
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).