2-Alkoxycarbonylpyridinium N-aminides: 1,3-Dipoles or 1,4-nucleophile- electrophile synthons? Experimental and theoretical evidence for the mechanism of pyrido[1,2-b]pyridazinium inner salt formation

1. Valenciano, J.
2. Cuadro, A.M.
3. Vaquero, J.J.
4. Alvarez-Builla, J.
5. Palmeiro, R.
6. Castaño, O.