New route to pyrido[1,2-b]pyridazinium inner salts. Evidence of a 1,3-dipolar cycloaddition-ring expansion process

Authors
Valenciano Martínez, JesúsUniversity of Alcalá Author; Cuadro Palacios, Ana MaríaUniversity of Alcalá Author; Vaquero López, Juan J.; Álvarez-Builla Gómez, JulioUniversity of Alcalá Author
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/3479
DOI: 10.1016/S0040-4039(98)02406-X
ISSN: 0040-4039
Publisher
Pergamon
Date
1999
Affiliation
Universidad de Alcalá. Departamento de Química Orgánica
Funders
We wish to express our thanks to the Comisión Interministerial de Ciencia y Tecnología (CICYT, project PM97-004) and to the Ministerio de Educación y Ciencia for a grant to one of us (J.V.M).
Bibliographic citation
Tetrahedron Letters, 1999, v. 40, p. 763-766
Keywords
N-aminides
Betaines
Rearrangement
1,3/1,4-dipoles
Westphal condensation
As-triazines
Derivatives
Project
PM97-004 (Comisión Interministerial de Ciencia y Tecnología-CICYT)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
http://dx.doi.org/10.1016/S0040-4039(98)02406-X
Rights
© Elsevier Science, 1999
Access rights
info:eu-repo/semantics/openAccess
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Abstract
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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