Nickel-catalyzed electrochemical couplings of vinyl halides: synthetic and stereochemical aspects.
J Org Chem 2000;
65:4575-83. [PMID:
10959862 DOI:
10.1021/jo000182f]
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Abstract
Homo- and cross-coupling involving alkenyl halides have been performed efficiently using an electroassisted nickel-complex catalysis. Valuable product such as conjugated dienes, beta,gamma- or gamma,delta-unsaturated esters, ketones, or nitriles, as well as alkenylated aryl compounds are thus prepared with high yields and high stereoselectivity. Partial isomerization is only observed in a few cases, when the alkenyl halide is involved in a late step of the catalytic cycle. This is the case in the preparation of (Z,Z)-1,3-diene.
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