Iron-Catalyzed Borylation Reactions of Alkynes: An Efficient Synthesis of E-Vinyl Boronates
Vikas S. Rawat, Bojja Sreedhar*
*Inorganic & Physical Chemistry Division, Indian Institute of Chemical Technology (Council of Scientific & Industrial Research), Hyderabad 500607, India, Email: sreedharbiict.res.in
V. S. Rawat, B. Sreedhar, Synlett, 2014, 25, 1132-1136.
DOI: 10.1055/s-0033-1341048 (free Supporting Information)
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Ferric chloride catalyzes an efficient monoborylation of alkynes using bis(pinacolato)diboron to provide E-vinyl boronates with high regio- and stereoselectivity in good to excellent yields. Using iron nanoparticles, a high catalytic activity was observed and the catalyst could be recovered simply by using an external magnetic field. The magnetic nanoparticles were recycled six times without any significant loss of catalytic activity.
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alkynes, catalysis, hydroboration, iron, nanostructures, vinylboronates