Abstract
Amidrazone 1 reacted with the unsymmetrical tricarbonyls 2a , 2c and 2d giving triazines 3a , 3c and 3d , respectively. These triazines were converted into their corresponding pyridine derivatives 6a , 6c and 6d in aza Diels–Alder reactions with 2,5-norbornadiene 5 . Triazines 3c and 3d gave the pyridolactones 9c and 9d with 2,3-dihydrofuran.
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