Catalytic Photoredox C–H Arylation of 4-Oxo-4<i>H</i>-pyrido[1,2-<i>a</i>]pyrimidine-3-diazonium Tetrafluoroborates and Related Heteroaryl Diazonium Salts
作者:Kris Antolinc、Helena Brodnik、Uroš Grošelj、Bogdan Štefane、Nejc Petek、Jurij Svete
DOI:10.1021/acs.joc.3c01517
日期:2023.10.6
presence of eosin Y disodiumsalt (EY-Na2) as a photocatalyst furnished the corresponding arylation products in 8–63% yields. The proposed photocatalytic cycle is analogous to that proposed previously for closely related photoredox C–H arylations with aryl diazonium salts as aryl radical sources. This method has a broad substrate scope and represents a metal-free alternative for the synthesis of 3-heteroaryl-substituted