Add time:08/07/2019         Source:sciencedirect.com

New, highly functionalised (1E,3E)-1-(benzoylamino)-4-(dimethylamino)buta-1,3-diene-1,2,3-tricarboxylates proved to be useful and versatile reagents in the formation of highly substituted pyridine, N-aminopyridine, pyrrole and pyrido[3,4-c]pyridazine derivatives. The formation of the particular type heterocyclic system is dependent on the starting (1E,3E)-1-(benzoylamino)-4-(dimethylamino)buta-1,3-diene-1,2,3-tricarboxylate. By an appropriate choice of different ester groups it is possible to drive the reactions towards the formation of either pyridine or pyrrole derivatives.

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