Eco-friendly H2O2 oxidation of 1,2-dihydroquinazoline-3-oxides to quinazoline-3-oxides
2-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 quinazoli
An efficient synthesis of quinazolines: a theoretical and experimental study on the photochemistry of oxime derivatives
A new photochemical method for the preparation of quinazolines (2) through irradiation of [2-(methyleneamino)phenyl]methanone oximes (1) is reported. The photoreaction has been studied in depth by experimental, theoretical and photochemical methods. A six-electron electrocyclic ring closure mechanism, followed by water loss, is proposed and rationalized to explain the formation of quinazolines (2).
Alonso, Rafael,Caballero, Alegría,Campos, Pedro J.,Sampedro, Diego,Rodríguez, Miguel A.
experimental part
p. 4469 - 4473
(2010/07/08)
Intramolecular Cyclization of Iminoxyl Radicals
Iminyl radicals, generated by oxidation of the corresponding O-carboxymethoximes with persulfate, do not cyclise onto an ajacent azo group but the structurally related iminoxyls cyclise to give indazoles.ESR evidence is presented for the intramolecular ad
Atmaram, Shiravanate,Forrester, Alexander R.,Gill, Melvyn,Napier, Russell J.,Thomson, Ronald H.
p. 641 - 648
(2007/10/02)
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