D. Ladurée, D. Florentin, M. Robba
Sep 1, 1980
Citations
0
Influential Citations
3
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The synthesis of the new heterocycles, 4-amino[1]benzofuro[3,2-g]cinnolines, was accomplished by the intramolecular cyclization of the Z-configuration of cyanoarylhydrazones. The latter compounds were obtained via interaction between the diazonium salt of 3-amino-dibenzofuran and various active methylene compounds via the Japp-Klingemann reaction. The alkaline treatment of azo intermediates 4, which may be isolated in the course of condensation, gave the corresponding cyanoarylhydrazones 5. A study of the configuration and possible isomerisations is reported.