Nano tetraimine Pd(0) complex as an efficient catalyst for phosphine-free Suzuki reaction in water and copper-free Sonogashira reaction under aerobic conditions

A nano tetraimine Pd(0) complex catalyst was successfully used as an efficient heterogeneous catalyst for the phosphine‐free palladium‐catalysed Suzuki coupling reaction in water at 80 °C. This nano tetraimine Pd(0) complex was also used for copper‐free Sonogashira reaction in dimethylformamide at 100 °C. The catalyst was easily recovered from the reaction mixture by centrifugation and reused for at least six cycles without any significant loss in its catalytic activity. Analysis of the reaction mixture using inductively coupled plasma analysis showed that leaching of palladium from the catalyst was negligible. The reactions can be performed efficiently for aryl iodides, bromides and also chlorides. Copyright © 2016 John Wiley & Sons, Ltd. The nano tetraimine Pd (0) complex was applied as an effective heterogeneous catalyst. The catalyst was useful for phosphine‐free Suzuki reaction in water at 80 oC and Cu‐free Sonogashira reaction in DMF at 100 oC. The catalyst was easily recovered from reaction mixture and reused at least for six cycles.