Samandram, RashinikumarÇetin Korukçu, MelihaCoskun, Necdet2024-06-042024-06-042021-06-030039-7911https://doi.org/10.1080/00397911.2021.1934876https://www.tandfonline.com/doi/full/10.1080/00397911.2021.1934876https://hdl.handle.net/11452/417372-Aminobenzaldehyde, 1-(2-aminophenyl)ethanone, and 2-aminophenyl phenyl methanone oximes 1 were reacted with aromatic aldehydes to give the corresponding 1,2-dihydroquinazoline-3-oxides 2. The latter were converted in high yields to a series of quinazoline-3-oxides 3 using an environmentally benign H₂O₂-tungstate oxidant system at room temperature. A high yielding one-pot procedure was also developed for the synthesis of compounds 3.eninfo:eu-repo/semantics/closedAccessRing-chain tautomerismPhotochemistryQuinoline1,2-dihydroquinazoline-3-oxideH₂O₂ oxidationN-oxidesQuinazolineQuinazoline-3-oxideChemistryArticle00065794800000123492356511510.1080/00397911.2021.19348761532-2432