Direct C–H difluoromethylenephosphonation of arenes and heteroarenes with bromodifluoromethyl phosphonate via visible-light photocatalysis
作者:Lin Wang、Xiao-Jing Wei、Wen-Long Lei、Han Chen、Li-Zhu Wu、Qiang Liu
DOI:10.1039/c4cc07925f
日期:——
difluoromethylenephosphonation of arenes and heteroarenes. Using commercially available diethyl bromodifluoromethyl phosphonate as a precursor of difluoromethyl radical, fac-Ir(ppy)3 as a photosensitizer and a 3 W blue LED as a light source, an array of aromatic compounds containing difluoromethylenephosphonyl groups were prepared directly from the corresponding arenes and heteroarenes in excellent to moderate yields
Palladium-Catalyzed Difluoroalkylation of Aryl Boronic Acids: A New Method for the Synthesis of Aryldifluoromethylated Phosphonates and Carboxylic Acid Derivatives
The palladium‐catalyzed difluoroalkylation of arylboronicacids with bromodifluoromethylphosphonate, bromodifluoroacetate, and further derivatives has been developed. This method provides a facile and useful access to a series of functionalized difluoromethylated arenes (ArCF2PO(OEt)2, ArCF2CO2Et, and ArCF2CONR1R2) that have important applications in drug discovery and development. Preliminary mechanistic
已开发出溴化二氟甲基膦酸酯,溴化二氟乙酸酯和其他衍生物的钯催化的芳基硼酸二氟烷基化反应。该方法为在药物发现和开发中具有重要应用的一系列功能化的二氟甲基化芳烃(ArCF 2 PO(OEt)2,ArCF 2 CO 2 Et和ArCF 2 CONR 1 R 2)提供了便捷而有用的途径。初步的机理研究表明,单电子转移(SET)途径可能参与了催化循环。