Synthèse et caractérisation de poly-hétérocycles bioactifs

Abstract

This manuscript includes three main parts: In the first chapter, we described a new method for preparation of 2-aryl-2,3-dihydro-4-quinolonesby the use of the cyclization of the corresponding 2-aminochalconesvia an azaMichael reaction. This method was catalyzed by a DABCO’s ionic liquid which allowed us to obtain quantitatively our intended products in a single step. In the second chapter, we synthesized a series of new 1,2-dihydroquinazoline derivatives by a one pot reaction, from benzaldehyde derivatives, ammonium acetate and 2-aminobenzophenones in the presence of DMAP. Similarly, we described the synthesis of new hybrid quinazoline-quinoline compounds from raw materials and other easily accessible key intermediates. Finally, the study that we have undertaken in this final chapter of the thesis has as main objective, the preparation of novel heterocyclic analogues of Tacrine (used in the treatment of Alzheimer's disease) based pyranopyrazole and pyrimidine structures.