An expeditious protocol for the one-pot synthesis of 1,4-disubstituted (β-hydroxy)-1,2,3-triazoles in an aqueous medium has been developed using copper aluminate nanoparticles. This heterogeneous catalytic system was found to drive a multicomponent click reaction between organic azides (generated in situ from epoxides or halides) and terminal aliphatic or aromatic alkynes in up to 96% yield without
α-Oxo BMIDA gold carbenes are oxidatively generated from BMIDA-terminated alkynes. With the electrophilicity modulated by BMIDA, these carbene species undergo C−H insertion in the absence of the Thorpe–Ingold effect. This chemistry provides expedient access to structurally diverse α-boryl ketones, which were previously scarcely documented.