Effective Catalytic Approach of NiTiO3 Photosonocatalyst for the Synthesis of Indazolo[3,2‐b]quinazoline and Its Photophysical Property

A novel, flexible and strong technique for the synthesis of indazolo[3,2‐b]quinazoline motifs using NiTiO3 as a mild catalyst was reported. The reaction was effectively created utilizing 3,4‐dihydronaphthalen‐1(2H)‐one (1a), benzaldehyde (2a) and 1H‐indazol‐3‐amine (3a) by visible light/ultrasonic medium. Moreover, a proposed reaction pathway included Claisen–Schmidt condensation; Michael reaction with the nucleophilic endocyclic processes and oxidation for three‐component domino convention is also examined. The synthesized compounds were fluorescent in nature and have high fluorescence quantum yields.