A Convenient Synthesis of Azolo-fused 2H-Benzopyrans
The synthesis of substituted 7,7-diphenyl-7H-pyranobenzazoles 2a-f and 7,7-diphenyl-7H-pyranobenzazoles 4a-d is described.Thus, suitable titanium(IV) phenolates reacted with β-phenylcinnamaldehyde in refluxing aprotic non-polar solvents.Elec
Pozzo, Jean-Luc,Lokshin, Vladimir A.,Guglielmetti, Robert