An efficient protocol was developed for one-pot condensation of an aldehyde, ketone, acetyl chloride, and nitriles catalyzed by a stable and reusable 1-methyl-imidazolium hydrogen sulfate ([Hmim][HSO4]) as a Brønsted acidic ionic liquid. The system tolerated a variety of functional groups affording the corresponding β-amido ketones in moderate to good yields under milder operating conditions.
β-amide ketones were synthesised by a three-component one-pot reaction of phenylacetylene, aldehydes, and amides in anhydrous acetonitrile containing trifluoroacetic acid and acetic acid in the presence of AlCl3 catalyst. The title compound structures were identified by 1H NMR, 13C NMR, MS, and elemental analysis.