Double diastereoselectivite de la cycloaddition dipolaire-1,3 d'ylures d'azomethine cycliques substitues
Seven derivatives of methyl 5-phenyl-3,4-dihydro-2H-pyrrole-2-carboxylates 1 were synthesized.These compounds are precursors of pentagonal cyclic azomethine ylides, the two sides of which are diastereotopic.The 1,3-dipolar species react with N-methyl and