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Fluorinated nitrogen heterocycles via cyclization. IV. s-Triazolo[4,3-a] pyridines and tetrazolo[1,5-a] pyridines from 4-trifluoromethyl-2-hydrazinopyridines

✍ Scribed by Seymour Portnoy

Book ID: 112122190
Publisher: Journal of Heterocyclic Chemistry
Year: 1970
Tongue: English
Weight: 177 KB
Volume: 7
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570070341

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## Abstract The pyridinium salts **2a,b** reacted with dimethyl acetylenedicarboxylate (DMAD) to give the indolizine derivatives **6a,b**. Pyridinium salts **2a,b** also reacted with pyrazole‐5‐diazonium salt to afford the hydrazonoyl bromides **8a,b**, which on treatment with aqueous ethanolic sod