20.500.12556/RUL-152684 Catalytic photoredox C–H arylation of 4-oxo-4H-pyrido[1,2-a]pyrimidine-3-diazonium tetrafluoroborates and related heteroaryl diazonium salts Irradiation of mixtures of title diazonium salts and heteroarenes with green light (510 nm) in the presence of eosin Y disodium salt (EY-Na$_2$) 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 4H-quinolizin-4-ones and azino- and azolo-fused pyrimidones with a bridgehead nitrogen atom. quinolizines pyrido[1 2-a]pyrimidines thiazolo[3 2-a]pyrimidines photoredox catalysis arylation cross-coupling chemical reactions mixtures molecular structure salts kinolizini pirido[1 2-a]pirimidini tiazolo[3 2-a]pirimidini fotoredoks kataliza arilacija spajanje true false true Angleški jezik Slovenski jezik Članek v reviji 2023-12-04 13:22:02 2023-12-04 13:22:03 2023-12-05 03:41:06 0000-00-00 00:00:00 2023 0 0 Str. 13934−13945 iss. 19 Vol. 88 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 547.85-304.4 0022-3263 10.1021/acs.joc.3c01517 163747843 antolinc-et-al-2023-catalytic-photoredox-c-h-arylation-of-4-oxo-4h-pyrido-1-2-a-pyrimidine-3-diazonium.pdf antolinc-et-al-2023-catalytic-photoredox-c-h-arylation-of-4-oxo-4h-pyrido-1-2-a-pyrimidine-3-diazonium.pdf 1 E43078B375139645523B7E74CC73F4AF 460ab9415a2b03af6975ab3e27dc4bff34ae0b4cb55c6d2be0f34d73ffd97193 0ae0b848-92a0-11ee-9ca9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178293 https://pubs.acs.org/doi/10.1021/acs.joc.3c01517 1 bbacf9c2-929f-11ee-9ca9-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178292 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0