Carboncarbon bond forming reactions: Application of covalently anchored 2,4,6-triallyloxy-1,3,5-triazine (TAT) Pd(II) complex over modified surface of SBA-15 to Heck, Suzuki, Sonogashira and Hiyama cross coupling reactions

• The SBA-15-TAT-Pd(II) catalyst requires low palladium loading (0.62 mmol% Pd).
• The catalyst displays extraordinary substrate generality.
• The catalyst requires relatively shorter period of time.
• The catalyst can be reused up to five times without affecting the yield of product.
• The catalyst can also be employed for gram scale reactions.

A highly active SBA-15-TAT-Pd(II) catalyst was synthesized from organofunctionalized SBA-15 and 2,4,6-triallyloxy-1,3,5-triazine. The catalyst was employed in carrying out Heck, “copper-free” Sonogashira, Suzuki and Hiyama cross coupling reactions. Under the optimized conditions the catalyst displays excellent catalytic activity in delivering the desired products in good to excellent yields. The catalytic system exhibited superior activity regarding the time taken for the completion of reaction, isolation, Pd loading (0.62 mmol%) and yields of products as compared to the earlier reported heterogeneous SBA-15 anchored Pd catalysts. The catalyst could be recycled and reused for five times without any appreciable loss of catalytic activity.

SBA-15-TAT-Pd(II) catalyst was successfully synthesized and employed in the Heck, Sonogashira, Suzuki and Hiyama cross coupling reactions. The catalyst displayed excellent reactivity in terms of yield, recyclability and reusability.Figure optionsDownload as PowerPoint slide