Palladium-Catalyzed C–C Bond Activation of Cyclopropenone: Modular Access to Trisubstituted<i>α,β</i>-Unsaturated Esters and Amides
作者:Tanmayee Nanda、Pragati Biswal、Bedadyuti Vedvyas Pati、Shyam Kumar Banjare、Ponneri Chandrababu Ravikumar
DOI:10.1021/acs.joc.0c02700
日期:2021.2.5
Strain-driven palladium/N-heterocyclic carbene-catalyzed C–C bond activation of diphenylcyclopropenone (DPC) has been explored for one-step access to trisubstituted α,β-unsaturated esters and amides. The designed transformation works under mild conditions providing exclusively a single stereoisomer. Mechanistic studies support the oxidative addition of the C–C bond of cyclopropenone to in-situ-generated
已探索了应变驱动的钯/ N-杂环卡宾催化的二苯基环丙烯酮(DPC)的C–C键活化,以便一步一步获得三取代的α,β-不饱和酯和酰胺。设计的转化可在温和条件下工作,仅提供一个立体异构体。机理研究支持环丙烯酮的C–C键向原位生成的Pd(0)中间体的氧化加成。通过氘标记研究,我们已经证明了产品中的乙烯基氢来自苯酚/苯胺。生物活性分子(如普鲁卡因,雌酮和羟甲基吗啡酮)的后期功能化证明了该方案的鲁棒性。