SUBSTITUTED BICYCLIC HETEROARYL COMPOUNDS AS RXR AGONISTS
申请人:CONNEXIOS LIFE SCIENCES PVT. LTD.
公开号:US20160333004A1
公开(公告)日:2016-11-17
The present invention relates to certain substituted bicyclic compounds that are agonists of RXR and which are therefore useful in the treatment of certain disorders that can be prevented or treated by activation of this receptor. In addition the invention relates to the compounds, methods for their preparation, pharmaceutical compositions containing the compounds and the uses of these compounds in the treatment of certain disorders.
Irradiation of bicyclo[3.1.0]hexane-2,4-diones affords isomeric enol lactones retaining the cyclopropane ring. In contrast, photoreaction of 6,6-dimethylspiro[2.5]octane-4,8-dione in ethanol results in the formation of an isomeric benzofuran derivative and dimedone-acetaldehyde condensation product. Cleavage of the cyclopropane ring is characteristic of the behavior of the latter β-diketone.
Selected regiocontrolled transformations applied to the synthesis of (1S)-cis-chrysanthemic acid from (1S)-3,4-epoxy-2,2,5,5-tetramethylcyclohexanol
作者:Alain Krief、Humaira Y. Gondal、Adrian Kremer
DOI:10.1039/b808695h
日期:——
(1S)-cis-Chrysanthemic acid has been prepared in a few steps with complete control of the relative and absolute stereochemistry using regiocontrolled epoxide ring opening, diol mono-oxidation and cyclopropanation.
Novel synthesis of (d,l)-cis-chrysanthemic acid involving α,α′-dibromination of 2,2,5,5-tetramethylcyclohexane-1,3-dione: application to the enantioselective synthesis of (1R)-cis-chrysanthemic acid
作者:Alain Krief、Willy Dumont、Adrian Kremer
DOI:10.1016/j.tetlet.2009.03.001
日期:2009.5
cis-Chrysanthemic acid has been prepared in a few steps from dimethyldimedone viadibromination at alpha positions of each carbonyl carbons. The trans-dibromide which is almost exclusively formed has been isomerized to its cis-stereoisomer by highly chemoselective tandem H/K–K/H exchanges involving potassium bases at low temperature (<−40 °C). Carbocyclization of the potassium enolate intermediate