Stille coupling reactions catalysed by a polymer supported palladium complex

The coupling between aryl iodides and bromides with organostannanes (Stille reaction) has been investigated in the presence of a polymer supported palladium catalyst. The reaction could be performed in air without any activating ligand and with non-dried solvents. The catalyst, which acts by releasing controlled amounts of soluble active species, could be recycled several times in the coupling between Sn(CH3)4 or nBu3SnPh with iodoarenes or activated bromoarenes.

Pd(AAEMA)2 supported complex (Pd-pol) [AAEMA− is the deprotonated form of 2-(acetoacetoxy)ethyl methacrylate] is an active catalyst for the Stille coupling of iodoarenes or activated bromoarenes with different organostannanes. Its recyclability was satisfactory when Sn(CH3)4 or PhSnnBu3 were used with iodoarenes or activated bromoarenes.Figure optionsDownload as PowerPoint slide