A selective de-O-methylation of guaiacyl lignans to corresponding catechol derivatives by 2-iodoxybenzoic acid (IBX). The role of the catechol moiety on the toxicity of lignans
[EN] SYNTHESIS OF IMPERANENE DERIVATIVES FROM HYDROXYMATAIRESINOL<br/>[FR] SYNTHESE DE DERIVES D'IMPERANENE A PARTIR D'HYDROXYMATAIRESINOL
申请人:HORMOS NUTRACEUTICAL OY LTD
公开号:WO2003066557A1
公开(公告)日:2003-08-14
This invention concerns a method for the preparation of imperanene from hydroxymatairesinol. In a first step hydroxymatairesinol is converted to 4-(4-hydroxy-3-methoxyphenyl)-2-(4-hydroxy-3-methoxyphenylmethyl)-but-3-enoic acid. This acid is then preferably esterified by use of an alcohol R-OH, wherein R is an alkyl or aryl group, to an ester (III), which is reduced to imperanene.The invention concerns also the use of esters (III) as intermediates in the synthesis of imperanene and novel esters of formula (III).