Steroid imines as chiral ligands. Diastereoselective formation of (1-azadiene)Fe(CO)3 complexes by sterically tuning the ligand coordination spheres
摘要:
The condensation of steroid amines with alpha,beta-unsaturated aldehydes leads to the formation of chiral 1-azadiene ligands with a steroid core attached to nitrogen. If the azadiene chain is situated at the D-ring of the steroid at C-16 or C-17, respectively, the two diastereotopic faces of the ligand may be discriminated by different neighbouring substituents and their configuration. The reaction of these ligands with Fe-2(CO)(9) produces mixtures of diastereomeric (1-azadiene)Fe(CO)(3) complexes. By increasing the steric demands of the neighbouring groups it is possible to improve the diastereoselectivity of this complexation reaction from 1:1 mixtures using the least sterically hindered ligands to complete diastereoselectivity using the azadiene derived from cinnamaldehyde and 16 beta-amino-3-methoxy-estra-1,3,5(10)-triene-17 beta-ol. In addition, the molecular structure of [17 beta-(3-phenyl-prop-2-enyliden)-amino-3-methoxy-estra-1,3,5(10)-triene]Fe(CO)(3) was determined by X-ray structure analysis. (C) 1999 Elsevier Science Ltd. All rights reserved.
DERIVATIVES OF STEROID BENZYLAMINES, HAVING AN ANTIPARASITIC ANTIBACTERIAL, ANTIMYCOTIC AND/OR ANTIVIRAL ACTION
申请人:Becker Katja
公开号:US20130266645A1
公开(公告)日:2013-10-10
The present invention relates to compounds derived from steroids of the general formula (I)
wherein L represents a linker and R
#
represents a steroid residue, the use of compounds of the general formula (I) in medicine and for the prophylaxis and/or the treatment of infectious diseases. Furthermore described are pharmaceutical compositions containing at least one compound of the general formula (I). A further aspect of the invention relates to the synthesis of said compounds of the general formula (I).
Derivatives of steroid benzylamines, having an antiparasitic antibacterial, antimycotic and/or antiviral action
申请人:Becker Katja
公开号:US09382288B2
公开(公告)日:2016-07-05
The present invention relates to compounds derived from steroids of the general formula (I)
wherein L represents a linker and R# represents a steroid residue, the use of compounds of the general formula (I) in medicine and for the prophylaxis and/or the treatment of infectious diseases. Furthermore described are pharmaceutical compositions containing at least one compound of the general formula (I). A further aspect of the invention relates to the synthesis of said compounds of the general formula (I).
The condensation of steroid amines with alpha,beta-unsaturated aldehydes leads to the formation of chiral 1-azadiene ligands with a steroid core attached to nitrogen. If the azadiene chain is situated at the D-ring of the steroid at C-16 or C-17, respectively, the two diastereotopic faces of the ligand may be discriminated by different neighbouring substituents and their configuration. The reaction of these ligands with Fe-2(CO)(9) produces mixtures of diastereomeric (1-azadiene)Fe(CO)(3) complexes. By increasing the steric demands of the neighbouring groups it is possible to improve the diastereoselectivity of this complexation reaction from 1:1 mixtures using the least sterically hindered ligands to complete diastereoselectivity using the azadiene derived from cinnamaldehyde and 16 beta-amino-3-methoxy-estra-1,3,5(10)-triene-17 beta-ol. In addition, the molecular structure of [17 beta-(3-phenyl-prop-2-enyliden)-amino-3-methoxy-estra-1,3,5(10)-triene]Fe(CO)(3) was determined by X-ray structure analysis. (C) 1999 Elsevier Science Ltd. All rights reserved.