Syntheses based on furancarboxylic acid amides. 1. Synthesis and structure of 2-(5-R-2-furyl)-4-oxoquinazolines

2-(5-R-2-Furyl)-4-oxoquinazolines are formed in the condensation of furancarboxylic acid primary amides with anthranilic acid in the presence of phosphorus oxychloride. It was determined by x-ray diffraction analysis, IR and PMR spectroscopy, and mass spectrometry that a labile hydrogen atom is bonded to the nitrogen atom in the 3-position and that the molecule has an s-NH,0-trans conformation.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1463–1466, November, 1989.