Stereospecific Ni-catalyzed cross-coupling of potassium alkenyltrifluoroborates with alkyl halides.

Stereospecific Ni-catalyzed cross-coupling of potassium alkenyltrifluoroborates with alkyl halides.

Organic letters (2014-03-29)

Gary A Molander, O Andreea Argintaru

ABSTRACT

A general method for the alkenylation of alkyl electrophiles using nearly stoichiometric amounts of the air- and moisture-stable potassium organotrifluoroborates has been developed. Various functional groups were tolerated on both the nucleophilic and electrophilic partner. Reactions of highly substituted E- and Z-alkenyltrifluoroborates, as well as vinyl- and propenyltrifluoroborates, were successful, and no loss of stereochemistry or regiochemistry was observed.

MATERIALS

Product Number

Brand

Product Description

267074

Sigma-Aldrich

Nickel, rod, diam. 6.35 mm, ≥99.99% trace metals basis

266981

Sigma-Aldrich

Nickel, powder, <50 μm, 99.7% trace metals basis

357553

Sigma-Aldrich

Nickel, foil, thickness 0.5 mm, 99.98% trace metals basis

357626

Sigma-Aldrich

Nickel, wire, diam. 0.5 mm, ≥99.9% trace metals basis

577995

Sigma-Aldrich

Nickel, nanopowder, <100 nm avg. part. size, ≥99% trace metals basis

357588

Sigma-Aldrich

Nickel, foil, thickness 0.1 mm, 99.98% trace metals basis

GF38428241

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Nickel, foil, 15mm disks, thickness 0.5mm, as rolled, 99.99+%

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Nickel, foil, 25mm disks, thickness 0.15mm, annealed, 99%

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Nickel, wire reel, 50m, diameter 0.025mm, as drawn, 99.6+%

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