Fly-ash:H2SO4 catalyzed solvent free efficient synthesis of some aryl chalcones under microwave irradiation

Some 2E aryl chalcones have been synthesized using greener catalyst Fly-ash:H2SO4 assisted solvent free environmentally benign Crossed-Aldol reaction. The yields of chalcones are more than 90%. The synthesized chalcones are characterized by their physical constants and spectral data.

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► Green catalyst Fly-ash:H2SO4 was prepared by Fly-ash and sulphuric acid.
► Fly-ash:H2SO4 catalyst was characterized by SEM analysis and IR data.
► Some aryl-aryl chalcones were synthesized by Crossed-Aldol reaction using Fly-ash:H2SO4 catalyst under microwave heating.
► Better yields of the chalcones (more than 90%) obtained.
► Easy-workup procedure, environmentally solvent free synthetic method was adopted.