[(IPr)Pd(0)] species : a versatile, well-defined catalyst precursor for cross coupling reactions

The catalytic application of the newly commercial available complex (IPr)Pd(allyl)Cl (IPr = N,N '-bis(2,6-diisopropyl)imidazol-2-ylidene) is described. This complex is an lent source in generating the active 12-electron [(IPr)Pd(0)] palladium species under mild catalytic conditions. As a result it performs a number of organic transformations very effectively and allows for the use of the inexpensive aryl chlorides as coupling partners in cross-coupling chemistry. These non-phosphine palladium systems also permit simple workup procedures. Processes incorporating these catalysts seem feasable as several well defined Pd NHC complexes are availiable at industrial scale.

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