Nickel-catalyzed electrochemical couplings of vinyl halides: Synthetic andstereochemical aspects

Homo- and cross-coupling involving alkenyl halides have been performed effi ciently using an electroassisted nickel-complex catalysis. Valuable product such as conjugated dienes, beta,gamma- or gamma,delta-unsaturated eaters, ketones, or nitriles, as well as alkenylated aryl compounds are thus prepar ed with high yields and high stereoselectivity. Partial isomerization is on ly observed in a few cases, when the alkenyl halide is involved in a late s tep of the catalytic cycle. This is the case in the preparation of (Z,Z)-1, 3-diene.