Copper/Palladium Bimetallic System for the Synthesis of Isobenzofuranones through [4 + 1] Annulation between Propiophenones and Benzoic Acids
作者:Xiao Liang、Mingteng Xiong、Heping Zhu、Keqiang Shi、Yifeng Zhou、Yuanjiang Pan
DOI:10.1021/acs.orglett.0c03627
日期:2020.12.18
A copper/palladium-catalyzed annulation from benzoic acids and propiophenones for the synthesis of isobenzofuranones was reported. The Cu-(2,2,6,6-tetramethylpiperidin-1-yl)oxyl system showed a great ability to activate the C–H bond on the α- and β-carbons of a carbonyl group, and the in situ-generated enone intermediate in this reaction could be further transformed to construct isobenzofuranones with
据报道,铜/钯催化的苯甲酸和苯乙酮环化反应可合成异苯并呋喃酮。Cu-(2,2,6,6-四甲基哌啶-1-基)氧基系统显示出强大的活化羰基α-碳和β-碳上的CH键的能力,并就地生成该反应中的烯酮中间体可以在Pd(dba)2(dba =二苄叉基丙酮)的催化下进一步转化成异苯并呋喃酮。可以以中等到良好的产率获得各种异苯并呋喃酮,并且通过使用该方法突出了巨大的原子经济性。