oxyphosphorylation of alkenes and alkynes with water for β-ketophosphonates has been developed through the radical coupling under electrochemical conditions. This protocol is compatible with a wide range of alkenes, alkynes, and diarylphosphorus derivatives, and enables the gram-scale synthesis of β-ketophosphonates. The mechanistic study revealed that the P radicals were generated via hydrogen atom transfer (HAT)
Copper-Catalyzed Stereoselective Radical Phosphono-hydrazonation of Alkynes
作者:Olukayode Olamiji Ogundipe、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1021/acs.joc.2c01959
日期:2022.11.4
A copper-catalyzed stereoselective phosphono-hydrazonation of terminal alkynes with alkyl carbazates and diarylphosphine oxides is described. This methodology provides facile access to a variety of β-hydrazonophosphine oxides in satisfactory yields. The reaction proceeds under mild conditions and exhibits good functional group tolerance. A mechanism featuring persulfate-mediated oxidative generation