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

摘要

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 excellent source in generating the active 12-electron [(IPr)Pd(O)] 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.