Pyridinium-N-(2-pyridyl)aminides: A selective approach to substituted 2-aminopyridines
作者:Rosa Carceller、Jose L. García-Navío、María L. Izquierdo、Julio Alvarez-Builla
DOI:10.1016/s0040-4039(00)91991-9
日期:1993.3
Differently substituted 2-aminopyridines have been prepared in two steps from pyridinium-N-(2-pyridyl)aminide, by reaction with the corresponding elect
分两步从吡啶鎓-N-(2-吡啶基)氨基化物制备二取代的2-氨基吡啶,方法是与相应的
Azinium-N-(2′-azinyl)aminides: synthesis, structure and reactivity
作者:Rosa Carceller、Jose L. García-Navío、María L. Izquierdo、Julio Alvarez-Builla、Mariano Fajardo、Pilar Gómez-Sal、Federico Gago
DOI:10.1016/s0040-4020(01)90411-9
日期:1994.4
Several azinium-N-(2′-azinyl)aminides are reported. The structure of pyridinium-N-(2′-pyridyl)aminide has been studied, both in solution and in crystalline state, and results have been compared. In non-polar solvents, the aminides present a planar conformation stabilized by an intramolecular hydrogen bond. The reactivity toward electrophiles confirms the structural data, producing either N- or C- substitutions
Regioselective Synthesis of 2-Amino-5-(or 3-)arylazo-Substituted Pyridines and Pyrazines from Pyridinium<i>N</i>-Aminides
作者:Elena Gala、M. José Reyes、Julio Alvarez-Builla、M. Luisa Izquierdo
DOI:10.1002/ejoc.201600059
日期:2016.4
Differently modified 2-aminopyridines and pyrazines bearing an arylazo group at the 3- or 5-position have been generated from pyridinium N-aminides in a regioselective fashion. The detailed chemistry starts with attack of the N-aminide on a diazonium salt, to form the arylazo derivative. N-alkylation on the exocyclic nitrogen and reduction to break the N–N bond then affords the final compounds, as