<p>In the present research, inorganic titanium phosphate (TiP) and hybrid titanium-aminotrismethylene phosphonic acid (Ti-ATMP) materials, belonging to the class of tetravalent metal acid (TMA) salts, have been synthesized via the sol–gel route. These materials have been characterized by high-angle X-ray diffraction (HXRD), thermogravimetric analysis (TGA), Fourier transforms infrared spectroscopy (FT-IR), scanning electron microscopy-energy dispersive X-ray analysis (SEM–EDX), X-ray photoelectron spectroscopy (XPS), High resolution-transmission electron microscopy (HR-TEM), N₂ sorption isotherms and evaluation of surface acidity via the temperature programmed desorption (NH₃-TPD) method. Due to the presence of exchangeable protons in the framework of TiP and Ti-ATMP materials, they can act as solid acid catalysts and hence an attempt has been made for the catalyzed synthesis of&#xa0;dihydropyrimidinones (DHPMs) using these materials. The effects of reaction time, temperature, catalyst concentration and substituents on DHPMs synthesis have been studied. Further, the reaction is carried out in various solvents and under solvent free conditions in order to evaluate the feasibility of developed protocol to be used under diverse chemical environment. The isolated DHPM products were characterized based on their physical melting point (M.P.), FT-IR, ¹H and ¹³C NMR spectroscopy. The recyclability and stability studies of the catalysts have been performed to assess their potential for reuse.</p> Graphical abstract <p></p>