efficacious fabrication of 2-amino-4𝐻-chromenes using a new inorganic-organic hybrid nanomaterial

In this study, construction and characterization of a new inorganic-organic hybrid nanomaterial, and its usage as an efficacious catalyst for the solvent-free fabrication of 2-amino-4h-chromenes have been reported. the chromenes (10 examples) were procured in short reaction times (10-20 min) and high yields (89-98%) through the one-pot multi-component reaction of malononitrile, 1-naphthol and aryl aldehydes. the nanocatalyst was reusable for two times without significant loss of its activity. characterization of the nanomaterial titled [sio2@si(ch2)3-(4,4′-bipyridine)-1,1ʹ-diium][fecl4][h2po4] (scbfh) was done by analyses such as elemental mapping, xrd (x-ray diffraction), ft-ir (fourier-transform infrared spectroscopy), raman, fe-sem (field-emission scanning electron microscopy), tg (thermogravimetric), and eds (energy-dispersive x-ray spectroscopy).