New routes to the  v ‐triazolo[1,5‐ a ]pyridine and pyrazolo[1,5‐ a ]pyridine ring systems | Zendy

Tamura Yasumitsu | Zendy; Kim JoongHyup | Zendy; Miki Yasuyoshi | Zendy; Hayashi Hironori | Zendy; Ikeda Masazumi | Zendy

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New routes to the v ‐triazolo[1,5‐ a ]pyridine and pyrazolo[1,5‐ a ]pyridine ring systems

Author(s) -

Tamura Yasumitsu,

Kim JoongHyup,

Miki Yasuyoshi,

Hayashi Hironori,

Ikeda Masazumi

Publication year - 1975

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570120307

Subject(s) - chemistry , pyridine , quinoline , oxime , ring (chemistry) , ketone , amine gas treating , medicinal chemistry , organic chemistry

New routes to the v ‐triazolo[1,5‐ a ]pyridine and pyrazolo[1,5‐ a ]pyridine ring systems are described. Treatment of the N ‐amine salts of 2‐picolinealdehyde oxime or 2‐pyridyl ketone oximes with polyphosphoric acid gave v ‐triazolo[1,5‐ a ]pyridines in fair yields. Treatment of 2‐picolyl ketones or their oximes with O ‐mesitylenesulfonylhydroxylamine produced directly pyrazolo‐[1,5‐ a ]pyridines. These reactions were extended to the quinoline cases.

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