Abstract
Herein we present the synthesis of several new hydrazino derivatives of cyclopenta[c]pyridine, 5,6,7,8-tetrahydroisoquinoline and pyrano[3,4-c]pyridine from 3-oxo-4-cyano fused pyridine derivatives. The hydrazino derivatives obtained were used as starting materials for the synthesis of isomeric triazolopyrimidines as well as tetrazolopyrimidines. Furthermore, the rearrangement of triazolopyrimidines 7 into triazolopyrimidines 8 is also presented. In DMSO tetrazolopyrimidines 10 were shown to be in equilibrium with the relevant azidopyrimidines 9. The tetrazolopyrimidine structure was confirmed by X-ray crystallography. The synthesized compounds were tested for their antimicrobial activity.
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