An efficient chemo- and regioselective three-component synthesis of pyridazinones and phthalazinones using activated KSF

The first three-component and regioselective synthesis of pyridazinones and phthalazinones from arenes, anhydrides and ArNHNH2 in the presence of efficient recyclable heterogeneous catalyst, montmorillonite-KSF, in high yield and short reaction time is reported.