Mild and Functional Group Tolerant Method for Tandem Palladium-Catalyzed Carbocyclization-Coupling of ε-Acetylenic β-Ketoesters with Aryl Bromides and Chlorides
作者:Wojciech Chaładaj、Sylwester Domański
DOI:10.1002/adsc.201600175
日期:2016.6.2
report a new protocol for the annulative difunctionalization of acetylenes via tandem carbocyclization–coupling of ε‐acetylenic β‐ketoesters with aryl and heteroaryl bromides and chlorides catalyzed by the palladium species derived from an air‐ and moisture‐stable palladacyclic precatalyst. In the tandem process, the palladium complex combines appropriate carbophilic Lewis acidity and redox activity to catalyze
我们报告了一种通过串联碳环化来实现乙炔的双官能双官能化的新方案,即通过空气和水分稳定的四环前催化剂衍生的钯物种催化的ε-炔属β-酮酸酯与芳基和杂芳基溴化物和氯化物的偶联。在串联过程中,钯配合物结合了适当的嗜碳路易斯酸度和氧化还原活性,以催化两个机理上截然不同的反应-亲核性将烯酸酯加成至未活化的炔烃,然后进行CC偶联。