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

Molecules

Jérôme F. Vivat²  Sylvestre P. J. T. Bachollet²  Harry Adams²  Joseph P. A. Harrity¹ 

[1] Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK;

关键词: alkynylboronate;    trifluoroborate salt;    conjugation;    phosphine;    cross-coupling;   

DOI  :  10.3390/molecules191221324

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.