New synthesis of pyrazolo[1,2-a]pyridazinium salts
โ Scribed by V. N. Voshchula; S. V. Tolkunov; V. I. Dulenko
- Book ID
- 112359530
- Publisher
- Springer US
- Year
- 1985
- Tongue
- English
- Weight
- 41 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0009-3122
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Synthesis, Properties and Electronic Structure of 1,2,4-Triazolo(1,2a) pyridazinium and Benzotriazolo(1,2-a)pyridazinium Salts. -Acylation of 1-methallyltriazole derivatives in the presence of HClO4 provides the title triazolopyridazinium salts (III) or (VI), resp., which represent novel heterocycli
2-Alkoxyearbonylpyridinium N-aminides behave as 1,3-dipoles when reacted with Michael aeeeptors, giving rise to the corresponding cycloadducts which, depending on their regioisomeric nature, subsequently undergo a ring expansion to give pyrido[1,2-b]pyridazinium inner salts.
## Abstract A series of ฮฑโalkylโ__N__โaminoazinium and โazolium salts 1โ15 have been condensed with 1,2โdicarbonyl compounds to produce new heterocyclic cationic species 17โ25 with a quaternary nitrogen atom in the bridgehead position.