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Open AccessArticle

Synthesis, Characterisation and Reactions of Phosphine-Substituted Alkynylboronates and Alkynyltrifluoroborate Salts

Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK
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Molecules 2014, 19(12), 21324-21334; https://doi.org/10.3390/molecules191221324
Received: 13 November 2014 / Revised: 5 December 2014 / Accepted: 11 December 2014 / Published: 18 December 2014
(This article belongs to the Special Issue Recent Advances in Boron Chemistry)
The synthesis and structural characterisation of phosphine-substituted alkynylboronates is reported. A P(III)-centred alkynylboronate (2) was prepared that showed little evidence for the conjugation of the P-lone pair to the boron via the alkyne π-system, as judged by X-ray crystallography studies of 2 and a related P(V) compound, 3. In addition, corresponding alkynyltrifluoroborate salts were prepared that showed improved stability by comparison to their boronic ester counterparts. These salts undergo Pd-catalysed cross-coupling reactions with aryl halides. View Full-Text
Keywords: alkynylboronate; trifluoroborate salt; conjugation; phosphine; cross-coupling alkynylboronate; trifluoroborate salt; conjugation; phosphine; cross-coupling
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MDPI and ACS Style

Vivat, J.F.; Bachollet, S.P.J.T.; Adams, H.; Harrity, J.P.A. Synthesis, Characterisation and Reactions of Phosphine-Substituted Alkynylboronates and Alkynyltrifluoroborate Salts. Molecules 2014, 19, 21324-21334.

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