Cesium-Doped Tungstophosphoric Acid: An Efficient, Recyclable Catalyst for the Synthesis of 3-(3-(Substituted aryl/heteroaryl)acryloyl)-2H-chromen-2-one Derivatives in Water

The synthesis of a series of 3-(3-(substituted aryl/heteroaryl)acryloyl)-2H-chromen-2-one derivatives (3a-h) was achieved using cesium-doped tungstophosphoric acid (CsPW) as a catalysis in water. The recyclable catalyst Cs PW was characterized by Fourier transform infrared, X-ray diffraction, and scanning electron microscopy before and post-reaction. The stability and physical structure of the catalyst remains intact even after four reaction cycles. Moreover, the current synthetic procedure is environmentally friendly, clean, simple workup, excellent yield, and catalytic recovery.