Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A³ coupling reaction in water

A new heterogeneous catalyst derived from gold (III) and supported on caffeine‐coated magnetic nanoparticles, Fe 3 O 4 @Caff‐Au, has been prepared and characterized using different techniques. This magnetic gold composite shows high catalytic activity in A 3 coupling reactions of terminal alkynes, aldehydes and secondary amines. Using this green catalyst, propargylamines are obtained in high turnover frequency in short reaction times using water...