Palladium-Catalyzed Hydrocarbonylative Cyclization Enabled by Formal Insertion of Aromatic C═N Bonds into Pd–Acyl Bonds
作者:Xibing Zhou、Anrong Chen、Wei Du、Yawen Wang、Yu Peng、Hanmin Huang
DOI:10.1021/acs.orglett.9b03503
日期:2019.11.15
new formal insertion strategy via combination of reductive elimination and oxidative addition sequence was reported, in which the transient N-acyliminium ions formed via hydrocarbonylation function as key intermediates. This strategy has enabled a novel palladium-catalyzed hydrocarbonylative cyclization of azaarene-tethered alkenes or dienes via sequential insertion of a C═C bond, CO, and a C═N bond into
通过还原消除和氧化加成序列的组合,一种有效的新形式插入策略被报道,其中通过烃基化形成的瞬态N-酰基亚胺离子起关键中间体的作用。该策略通过将C═C键,CO和C bondN键顺序插入氢化钯键中,使新颖的钯催化的氮杂芳烃系链烯烃或二烯的烃基化环化反应成为可能。该方法为具有扩展的π-共轭体系,具有可调的发射波长和良好的光致发光能力的喹喔啉酮及其衍生物提供了一种新的高效合成方法。