Halogenation of pyridinium-N-(2′-pyridyl)aminide: An easy synthesis of halo-2-aminopyridines
摘要:
The regioselective halogenation of pyridinium-N-(2'-pyridyl)aminide 1 with N-chloro, bromo or iodosuccinimide under mild conditions is described. The method, combined with a reduction of the N-N bond, allows an easy preparation of 5-halo and 3,5-dihalo-2-aminopyridines 4.
Halogenation of pyridinium-N-(2′-pyridyl)aminide: An easy synthesis of halo-2-aminopyridines
摘要:
The regioselective halogenation of pyridinium-N-(2'-pyridyl)aminide 1 with N-chloro, bromo or iodosuccinimide under mild conditions is described. The method, combined with a reduction of the N-N bond, allows an easy preparation of 5-halo and 3,5-dihalo-2-aminopyridines 4.
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
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