New route to pyrido[1,2-b]pyridazinium inner salts. Evidence of a 1,3-dipolar cycloaddition-ring expansion process
2-Alkoxycarbonylpyridinium N-aminides behave as 1,3-dipoles when reacted with Michael accepters, 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.
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 1999 |
| País: | España |
| Recursos: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/3479 |
| Acesso em linha: | http://hdl.handle.net/10017/3479 https://dx.doi.org/10.1016/S0040-4039(98)02406-X |
| Access Level: | acceso abierto |
| Palavra-chave: | N-aminides Betaines Rearrangement 1,3/1,4-dipoles Westphal condensation As-triazines Derivatives Ciencia Química orgánica Science Chemistry, organic |
| Resumo: | 2-Alkoxycarbonylpyridinium N-aminides behave as 1,3-dipoles when reacted with Michael accepters, 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. |
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