Le present travail constitue une contribution a la synthese de nouveaux composes heterocycliques azotes utilisant les reactions d'ortho metallation dirigee et de metallation laterale qui declencheront des reactions tandems. Les travaux presentes dans ce memoire constituent une contribution a la synthese des derives polysubstitues des benzothiazines via la reaction de metallation ortho dirigee en serie aromatique (Directed Ortho Metallation Reaction)."
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