A. Marsili, M. Saettone, V. Scartoni
1968
Citations
0
Influential Citations
6
Citations
Journal
Tetrahedron
Abstract
Abstract The Schmidt reaction with 2-(o-carboxyphenyl)3-phenylindone (VI) in a mixture of sulphuric and acetic acid affords 12-phenyl-5H-[2]benzopyrano[3.4-b]quinoline-5-one (VII) as the main product. The methyl ester of V, which is almost unreactive towards hydrazoic acid in acetic-sulphuric acid solution, is converted mainly into 2-phenyl-3-(o-carbomethoxyphenyl)4--hydroxyquinoline (XVI) when the reaction is carried out in concentrated sulphuric acid solution.