METHOD OF PRODUCING 17BETA-(SUBSTITUTED)-3-OXO-DELTA 1,2-4-AZASTEROIDS AND INTERMEDIATES
申请人:Ragactives, S.L.
公开号:EP1437361A2
公开(公告)日:2004-07-14
The 17β-(substituted)-3-oxo-Δ1,2-azasteroids (I), wherein R1 is C1-C4 alkyl, OR2, wherein R2 is a C1-C4 alkyl radical, or NR3R4 , wherein R3 and R4, equal or different, represent hydrogen or a C1-C4 alkyl radical, can be obtained by means of a process comprising cleaving the oxazolidinedione ring present in a 2-(substituted)-3-hydroxyoxazolidinedione of formula (IV), wherein R5 is Br or trichloromethylsulfonyl, and removing the substituent at position 2, to form a double bond at position 1,2. Some compounds (I) are testosterone-5α-reductase inhibitors and can be used in the treatment of hyperandrogenic disorders.
Trialkysilyl trifluoromethanesulfonate mediated functionalization of 4-aza-5alpha-androstan-3-one steroids
申请人:MERCK & CO. INC.
公开号:EP0473226B1
公开(公告)日:1996-07-31
Process for obtaining 17beta-(substituted)-3-oxo-delta 1,2-4-azasteroids and intermediates
申请人:Ragactives, S.L.
公开号:US20040254209A1
公开(公告)日:2004-12-16
The 17&bgr;-(substituted)-3-oxo-&Dgr;
1,2
-4-azasteroids (I), wherein R
1
is C
1
-C
4
alkyl, OR
2
, wherein R
2
is a C
1
-C
4
alkyl radical, or NR
3
R
4
, wherein R
3
and R
4
, equal or different, represent hydrogen or a C
1
-C
4
alkyl radical, can be obtained by means of a process comprising cleaving the oxazolidinedione ring present in a 2-(substituted)-3-hydroxyoxazolidinedione of formula (IV), wherein R
5
is Br or trichloromethylsulfonyl, and removing the substituent at position 2, to form a double bond at position 1,2. Some compounds (I) are testosterone-5&agr;-reductase inhibitors and can be used in the treatment of hyperandrogenic disorders.
US7057045B2
申请人:——
公开号:US7057045B2
公开(公告)日:2006-06-06
METHOD OF PRODUCING 17BETA-(SUBSTITUTED)-3-OXO-DELTA 1,2-4-AZASTEROIDS