Straightforward and solvent-free synthesis of 2-amino-4H-chromenes in the presence of a choline-based magnetic ionic liquid as catalyst

Choline tetrachloroferrate with a magnetic response property is applied in multicomponent one-pot synthesis of 2-amino-4H-chromenes as effective catalyst. The catalyst is characterized by the UV–Vis and Raman spectroscopies and by the electrospray ionization mass spectrometry.