%0 Journal Article 
%A Valenciano Martínez, Jesús
%A Cuadro Palacios, Ana María
%A Vaquero López, Juan J.
%A Álvarez-Builla Gómez, Julio
%T New route to pyrido[1,2-b]pyridazinium inner salts. Evidence of a 1,3-dipolar cycloaddition-ring expansion process
%D 1999
%@ 0040-4039
%U http://hdl.handle.net/10017/3479
%X 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.
%K N-aminides
%K Betaines
%K Rearrangement
%K 1,3/1,4-dipoles
%K Westphal condensation
%K As-triazines
%K Derivatives
%K Ciencia
%K Química orgánica
%K Science
%K Chemistry, organic
%~ Biblioteca Universidad de Alcala