The first catalytic application of copper aluminate nanoparticles in C–C and C–O coupling reaction: green synthesis of some new α‐lapachone derivatives

This is the first use of copper aluminate nanoparticles (CuAl2O4 NPs) as efficient catalyst for the multicomponent organic synthesis. The CuAl2O4 NPs was prepared and characterized by XRD, SEM, and TEM for this purpose and applied in the green synthesis of pyranonaphthoquinones (α-lapachone derivatives) under solvent-free conditions. The nanocatalyst can be recycled and reused for four times.