Silver-catalyzed furoquinolines synthesis: from nitrogen effects to the use of silver imidazolatepolymer as a new and robust silver catalyst

Abstract

Silver-catalyzed tandem acetalization and cycloisomerization reactions were found to lead to various furoquinolines, and a nitrogen effect was noticed for AgOTf reactivity, since the cyclization mode switched from 6-endo-dig to 5-exo-dig; from these observations silver imidazolate polymer is proposed as a stable silver catalyst.