Expedient synthesis of some novel pregnane derivatives and their evaluation as anti-oxidant and anti-dyslipidemic agents
作者:Arun Sethi、Gitika Bhatia、Ashok K. Khanna、Mohammad Mobin Khan、Abha Bishnoi、Anil K. Pandey、Atul Maurya
DOI:10.1007/s00044-009-9280-y
日期:2011.1
Synthesis of a number of novel pregnane derivatives has been described in detail. They were prepared by reaction of 3β-hydroxy-5, 16-pregnadiene-20-one (2) with diethylene glycol, 2-methoxy ethanol, 1,2-propane diol, p-chloroaniline and p-fluoroaniline, respectively. The structures of these newly synthesized compounds have been established on basis of physical, analytical and spectral data. These pregnane
Allopregnanolone (3α-Hydroxy-5α-pregnan-20-one) Derivatives with a Polar Chain in Position 16α: Synthesis and Activity
作者:Barbora Slavíková、Zdena Krištofíková、Hana Chodounská、Miloš Buděšínský、Fernando J. Durán、Adriana S. Veleiro、Gerardo Burton、Alexander Kasal
DOI:10.1021/jm801454a
日期:2009.4.9
The lipophilic nature of allopregnanolone prevents its user-friendly application in human medicine. On inspiration by previously prepared allopregnanolone with a 16 alpha-bound tetraethylammonium salt, an attempt was made to produce allopregnanolone analogues with polar groups introduced into position 16 alpha with the goal of increasing water solubility, brain accessibility, and potency of neuroactive steroids. The Michael addition to derivatives of pregn-16-en-20-one was the key reaction step. The link between the steroid skeleton and the new side chain was either a methylene group (when diethyl malonate was added) or an oxygen atom (when a hydroxy derivative was added). [S-35]TBPS displacement was used to evaluate the products. Several carbamates (but not their parent alcohols) displaced TBPS from the picrotoxin binding site on GABA(A) receptors. Although none of them was more potent than the above ammonium salt, which stimulated this study, their nonionic nature should not prevent their passage into the brain.