Pyrazolo[1,5-a]pyrido[3,4-e]pyrimidine: A New Heterocyclic Ring System
- 1 January 1990
- journal article
- research article
- Published by The Japan Institute of Heterocyclic Chemistry in HETEROCYCLES
- Vol. 31 (9) , 1635-1640
- https://doi.org/10.3987/com-90-5471
Abstract
Treatment of 6-acetyl-7-(2-dimethylaminovinyl)pyrazolo[1,5-a]pyrimidine (1) with hydroxylamine afforded in high yields the pyridine N-oxide (2), a key intermediate in the preparation of new functionalized pyrazolo[1,5-a]pyrido[3,4-e]pyrimidines as well as in the synthesis of the parent ring system (8).Keywords
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