Synthesis of oxazolo[4,5‐ c ]quinolones by thermolytic degradation of 4‐azido‐2(1 H )‐quinolones | Zendy

Steinschifter Waltraud | Zendy; Fiala Werner | Zendy; Stadlbauer Wolfgang | Zendy

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Synthesis of oxazolo[4,5‐ c ]quinolones by thermolytic degradation of 4‐azido‐2(1 H )‐quinolones

Author(s) -

Steinschifter Waltraud,

Fiala Werner,

Stadlbauer Wolfgang

Publication year - 1994

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.5570310662

Subject(s) - chemistry , yield (engineering) , ring (chemistry) , degradation (telecommunications) , stereochemistry , combinatorial chemistry , medicinal chemistry , organic chemistry , telecommunications , materials science , computer science , metallurgy

4‐Azido‐2(1 H )‐quinolones 1 are thermolyzed in the presence of carboxylic acids and polyphosphoric acid to yield oxazolo[4,5‐ c ]quinolones 3. Formation of other possible isomeric ring closure products such as oxazolo[5,4‐ c ]quinolones 2 or isoxazolo[4,3‐ c ]quinolones 4 could be excluded by independent syntheses.

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