[New derivatives of pyrazolo- and tetrazolobenzoquinolines with antimicrobial action]

The conditions for obtaining and the properties of some new diazabicyclic compounds is the new step in our investigation on the benzocynoline derivatives. The structure of the new compounds was confirmed by elementary (C, H, N) and spectral analyses. The antimicrobial tests evidenced that part of the newly synthetized compounds have a good antifungal action.

[Diazabicyclic systems (VII). Cycloaddition reactions of benzocinnoline via ylidic intermediates]

By the reaction of p-bromo-phenacyl bromide on the 3,8-dimethyl- and the 3,8-di-methoxy-benzocinnoline, a cycloimmonium salts was obtained which, in the presence of triethylamine, was converted to benzocinnolinium-phenacylides. The existence in situ of the ylids was furnished evidence of the 3+2 dipolar cyclo- addition reactions with various dipolarophiles, such dimethyl and diethyl acetylenedicarboxylate, diethyl propiolate and also with diethyl azodicarboxylate. Thus, the application of the 1.3-dipolar additions is a successful route for the synthesis of some new bicyclic two nitrogen bridged systems.