Synthesis of Isoflavones by Tandem Demethylation and Ring-Opening/Cyclization of Methoxybenzoylbenzofurans
作者:Phaladi Kunyane、Molahlehi S. Sonopo、Mamoalosi A. Selepe
DOI:10.1021/acs.jnatprod.9b00681
日期:2019.11.22
The unexpected conversion of benzoylbenzofurans into isoflavones through an intramolecular cascade that involves deprotection and ring-opening/cyclization is described. This was discovered in an investigation of the possible transformation of benzoylbenzofurans into coumaronochromones. This route affords isoflavones in two major steps from acetophenones and benzoquinones. The transformation was validated
描述了通过涉及脱保护和开环/环化的分子内级联意外地将苯甲酰基苯并呋喃转化为异黄酮。这是在对苯甲酰基苯并呋喃可能转化为香豆色酮的研究中发现的。这条路线从苯乙酮和苯醌分两个主要步骤提供了异黄酮。该转化通过合成不同取代的异黄酮衍生物得到了验证,并进一步应用于潜在的抗癌先导化合物glaziovianin A(1)的简明合成。