Bench-stable 2-halopyridinium ketene hemiaminals as new reagents for the synthesis of 2-aminopyridine derivatives

2-Chloro-1-(1-ethoxyvinyl)pyridinium triflate and several other bench-stable N-(1-alkoxyvinyl) 2-halopyridinium triflates have been developed as reagents for the synthesis of valuable 2-aminopyridine scaffolds via unusually mild SNAr substitu-tions with amine nucleophiles. Advantages of this approach include an operationally simple mix-and-stir procedure at room temperature or mild heat, ambient atmosphere, and without the... Show more