[EN] SYNTHESIS OF ISOFLAVANES AND INTERMEDIATES THEREOF<br/>[FR] SYNTHÈSE D'ISOFLAVONES ET INTERMÉDIAIRES DE CELLES-CI
申请人:SYSTEM BIOLOG AG
公开号:WO2016038061A1
公开(公告)日:2016-03-17
Subject of the invention is a method for enantioselective production of an isoflavane from an isoflavone, comprising the steps: (a) selectively reducing the isoflavone, such that the 4-keto group of the isoflavone is converted to a 4-hydroxy group, and the 2,3-double bond of the isoflavone is converted to a 2,3-single bond, thereby obtaining a 4-hydroxy intermediate, and (b) reacting the 4-hydroxy intermediate with a chiral reagent, such that a chiral group is covalently attached to the C4-position of the 4-hydroxy intermediate, thereby obtaining a chiral intermediate. The invention also relates to intermediates of formulae (IV), (V), (VI) and (VII) obtainable in the inventive process.
[EN] PRODUCTION OF ISOFLAVONE DERIVATIVES<br/>[FR] DERIVES D'ISOFLAVONE
申请人:NOVOGEN RES PTY LTD
公开号:WO2000049009A1
公开(公告)日:2000-08-24
Methods for the hydrogenation of isoflavones are described which provide access to workable quantities of isoflavan-4-ols, isoflav-3-enes, and isoflavans. The isoflavone derivatives can be obtained in high purity and in near quantitative yields whilst employing pharmaceutically acceptable reagents and solvents.
Aerobic Benzylic C(sp<sup>3</sup>)–H Bond Oxygenations Catalyzed by NBS under Visible Light Irradiation
作者:Taiqiang Ye、Yuzheng Li、Yanni Ma、Shenpeng Tan、Feng Li
DOI:10.1021/acs.joc.3c02284
日期:2024.1.5
An efficient photocatalytic oxidation of benzylic C(sp3)–H bonds to ketones, esters, and amides has been developed using NBS as a metal-free photocatalyst and O2 as an oxidant. A variety of synthetically and biologically valuable compounds are assembled in moderate to excellent yields. The synthetic utility of this approach has been demonstrated by gram-scale experiments. A possible free radical mechanism
Synthesis of isoflavanes and intermediates thereof
申请人:System Biologie AG
公开号:US10030003B2
公开(公告)日:2018-07-24
Subject of the invention is a method for enantioselective production of an isoflavane from an isoflavone, comprising the steps: (a) selectively reducing the isoflavone, such that the 4-keto group of the isoflavone is converted to a 4-hydroxy group, and the 2,3-double bond of the isoflavone is converted to a 2,3-single bond, thereby obtaining a 4-hydroxy intermediate, and (b) reacting the 4-hydroxy intermediate with a chiral reagent, such that a chiral group is covalently attached to the C4-position of the 4-hydroxy intermediate, thereby obtaining a chiral intermediate. The invention also relates to intermediates of formulae (IV), (V), (VI) and (VII) obtainable in the inventive process.