Synthesis of novel ketoconazole derivatives as inhibitors of the human Pregnane X Receptor (PXR; NR1I2; also termed SXR, PAR)
摘要:
PXR, pregnane X receptor, in its activated state, is a validated target for controlling certain drug-drug interactions in humans. In this context, there is a paucity of inhibitors directed toward activated PXR. Using prior observations with ketoconazole as a PXR inhibitor, the target compound 3 was synthesized from (s)-glycidol with overall 56% yield. (+)-Glycidol was reacted with 4-bromophenol and potassium carbonate in DMF to yield the ring opened compound 6. This was then heated to reflux in benzene along with 2', 4'-difluoroacetophenone and catalytic amount of para-toluene sulfonic acid to yield 8. The resultant acetal 8 was then functionalized using Palladium chemistry to yield the target compound 3. The activity of the compound was compared with ketoconazole and UCL2158H. However, in contrast with ketoconazole (IC50 similar to 0.020 mu M; similar to 100% inhibition), 3 has negligible effects on inhibition of microsomal CYP450 (maximum similar to 20% inhibition) at concentrations > 40 mu M. In vitro, micromolar concentration of ketoconazole is toxic to passaged human cell lines, while 3 does not exhibit cytotoxicity up to concentrations similar to 100 mu M(viability > 85%). This is the first demonstration of a chemical analog of a PXR inhibitor that retains activity against activated PXR. Furthermore, in contrast with ketoconazole, 3 is less toxic in human cell lines and has negligible CYP450 activity. (c) 2008 Elsevier Ltd. All rights reserved.
The phenyl glycidyl ether derivatives have been kinetically resolved with the growing cells of Bacillus alcalophilus MTCC10234 yielding (S)-epoxides with up to >99% ee and (R)-diols with up to 89% ee. The enantiomeric ratio (E) of up to 67 has been obtained for biohydrolysis process. The effect of different substituents of phenyl glycidyl ether on the biocatalytic efficiency of B. alcalophilus MTCC10234
KETOCONAZOLE-DERIVATIVE ANTAGONIST OF HUMAN PREGNANE X RECEPTOR AND USES THEREOF
申请人:Mani Sridhar
公开号:US20110105522A1
公开(公告)日:2011-05-05
The application discloses ketoconazole derivatives that are antagonists of the human pregnane X receptor (PXR), methods of preparing the derivatives, uses of the derivatives with drug therapy, and methods of inhibiting tumor cell proliferation and multidrug resistance using inhibitors of PXR.
US8669260B2
申请人:——
公开号:US8669260B2
公开(公告)日:2014-03-11
[EN] KETOCONAZOLE-DERIVATIVE ANTAGONISTS OF HUMAN PREGNANE X RECEPTOR AND USES THEREOF<br/>[FR] ANTAGONISTES DE DÉRIVÉS DE KÉTOCONAZOLE DU RÉCEPTEUR X DE PRÉGNANE HUMAIN ET LEURS UTILISATIONS
申请人:EINSTEIN COLL MED
公开号:WO2009110955A2
公开(公告)日:2009-09-11
The application discloses ketoconazole derivatives that are antagonists of the human pregnane X receptor (PXR), methods of preparing the derivatives, uses of the derivatives with drug therapy, and methods of inhibiting tumor cell proliferation and multidrug resistance using inhibitors of PXR.