Kumada-Tamao-Corriu reaction with Grignards

After Kumada and Tamao and Corriu independently reported the nickel(II) salts-and complexes-catalyzed cross-coupling reaction of Grignard reagents with aryl and alkenyl halides, the Pd-catalyzed reaction of Grignard reagents was first reported by Murahashi. ... 

The nickel-catalyzed reaction of Grignard reagent with an aryl halide, widely known as Corriu-Kumada-Tamao (CKT), constituted the first example of efficient cross-coupling reaction of aryl halides. However, the elassical protocol was not properly optimized and recent improvements have been achieved using NHC-Ni complexes. 

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