Eco-friendly H2O2 oxidation of 1,2-dihydroquinazoline-3-oxides to quinazoline-3-oxides


Samandram R., Çetin Korukçu M. , Coşkun N.

SYNTHETIC COMMUNICATIONS, vol.51, pp.2349-2356, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51
  • Publication Date: 2021
  • Doi Number: 10.1080/00397911.2021.1934876
  • Title of Journal : SYNTHETIC COMMUNICATIONS
  • Page Numbers: pp.2349-2356

Abstract

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 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.