The present invention provides an improved process for the preparation of Guggulsterones which comprises epoxidising 16-dihydropegnenolone acetate (16 DPA) by reacting 16DPA with hydrogen peroxide reagent adduct in the presence of a co-base in a polar solvent to obtain 3 &bgr; hydroxy-16 &agr;, 17-oxido-5 pregnen-20-one, converting the 3 &bgr; hydroxy-16&agr;, 17-oxido-5-pregnen-20-one by reacting with hydrazine in the presence of a strong base at refluxing temperature followed by oxidation to obtain desired guggulsterones viz. to 5, 17-(20)-cis and trans pregnadiene-3 &bgr;, 16-diol of the formula Ia and Ib.
[EN] PROCESS FOR PREPARING GUGGULSTERONES<br/>[FR] PROCEDE DE PREPARATION DE GUGGULSTERONES
申请人:COUNCIL SCIENT IND RES
公开号:WO2004060906A1
公开(公告)日:2004-07-22
The present invention provides an improved process for the preparation of Guggulsterones which comprises epoxidising 16-dihydropegnenolone acetate (16 DPA) by reacting 16DPA with hydrogen peroxide reagent adduct in the presence of a co-base in a polar solvent to obtain 3 β hydroxy-16 α, 17-oxido-5 pregnen-20-one, converting the 3 β hydroxy-16α, 17-oxido-5-pregnen-20-one by reacting with hydrazine in the presence of a strong base at refluxing temperature followed by oxidation to obtain desired guggulsterones viz. to 5, 17 - (20)-cis and trans pregnadiene - 3 β, 16-diol of the formula Ia and Ib.
Synthesis and inhibitory effect of cis-guggulsterone on lipopolysaccharide-induced production of nitric oxide in macrophages
作者:Jun Yeon Park、Jae Wook Lee、Chang-Ho Lee、Hae-Jeung Lee、Ki Sung Kang
DOI:10.1016/j.bmcl.2020.126962
日期:2020.3
isomeric pregnadienedione steroids were investigated against lipopolysaccharide-induced inflammatory reaction in RAW264.7 mouse macrophages. Our results showed that both guggulsterones inhibited the production of NO in macrophages treated with lipopolysaccharide, with IC50 values ranging from 3.0 to 6.7 μM. E-GS exerted higher efficacy than Z-GS, and its anti-inflammatory effects was mediated through inhibition
Process for preparing guggulsterones and guggulsterol
申请人:Kang Heonjoong
公开号:US20070055072A1
公开(公告)日:2007-03-08
The present invention relates to a method for selective preparing 4,17 (20)-E-pregnadiene-3,16-dione (E-guggul-sterone) of the formula (III) and 4,17 (20)-Z-pregnadiene-3,16-dione (Z-guggulsterone) of the formula (IV) having an effect of lowering the elevated low density lipoprotein (LDL) and high levels of the cholesterol effectively, and elevating the low levels of the high density lipoprotein (HDL) from a easy-available steroid of the following formula (I). Also, the present invention provides a method for preparation of the compound of the above formula (II).