Catalysis is an essential theme of modern chemistry. It occupies a strategic position in the search process more environmentally friendly and more economical energy to atoms and synthesis. Our work lies, on one hand, the development of an original biocatalyst and, secondly, in the pallado-catalyzed synthesis of new derivatives pyridopyrimidiniques. In the first part, the use of a new natural media prepared animal bone (Animal Bone Meal: ABM) based in heterogeneous catalysis has been implemented, which is a new and original way, to replace different solid catalysts currently known minerals and that, in several classical reactions in organic synthesis. In addition to the excellent yields, the positive aspects of ABM lies in its stability, ease of handling and regeneration as well as in the absence of environmental hazards. In the second part, a new strategy for simple and efficient synthesis of 2,4-di(het)aryl-pyrido[2,3-d]pyrimidine via a Suzuki- Miyaura coupling catalyzed by palladium has been developed. We then studied the reactivity of various 2,4,6- trihalogénopyrido[2,3-d]pyrimidine via Suzuki couplings. This study was extended to the synthesis of new 2,4,6- tri(het)arylpyrido[2,3-d]pyrimidine.
