From isonitrile to nitrile via ketenimine intermediate: Palladium-catalyzed 1,1-carbocyanation of allyl carbonate by α-isocyanoacetate
作者:Guanyinsheng Qiu、Charlotte Sornay、David Savary、Sheng-Cai Zheng、Qian Wang、Jieping Zhu
DOI:10.1016/j.tet.2018.10.032
日期:2018.12
A palladium-catalyzed 1,1-carbocyanation of allyl carbonate by α-quaternary α-isocyanoacetate was developed. Formation of ketenimine followed by homolysis of the CN bond and recombination of the resulting caged radical pair was proposed to account for the formation of the unusual coupling product, the β-cyano-γ,δ-unsaturated ester.
开发了α-季碳α-异氰基乙酸酯钯催化的碳酸烯丙酯的1,1-羰基氰化反应。提出了酮亚胺的形成,随后是C N键的均质化和所得笼形自由基对的重组,以解释异常偶联产物β-氰基-γ,δ-不饱和酯的形成。