title: Rhodium catalysed dehydrogenative borylation of alkenes: vinylboronates via C-H activation.
abstract: We present herein a high yield, highly selective catalytic synthesis of vinylboronate esters (VBEs), including 1,1-disubstituted VBEs, from alkenes without significant hydrogenation or hydroboration, using the simple catalyst precursor, trans-[RhCl(CO)(PPh3)2] (1), and the diboron reagents B2pin2 (2a, pin = pinacolato = OCMe2CMe2O) or B2neop2 (2b, neop = neopentylglycolato = OCH2CMe2CH2O), or the monoboron reagent HBpin, all of which are commercially available. The reactions were conducted at 80 degrees C using conventional heating, or in a microwave reactor at 150 degrees C.
authors.affiliation: Department of Chemistry, Durham University, Durham, UK.
authors.forename: Ibraheem A I
authors.initials: IA
authors.lastname: Mkhalid
authors.forename: R Benjamin
authors.initials: RB
authors.lastname: Coapes
authors.forename: S Natasha
authors.initials: SN
authors.lastname: Edes
authors.forename: David N
authors.initials: DN
authors.lastname: Coventry
authors.forename: Fabio E S
authors.initials: FE
authors.lastname: Souza
authors.forename: Rhodri Ll
authors.initials: RL
authors.lastname: Thomas
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Hall
authors.forename: Si-Wei
authors.initials: SW
authors.lastname: Bi
authors.forename: Zhenyang
authors.initials: Z
authors.lastname: Lin
authors.forename: Todd B
authors.initials: TB
authors.lastname: Marder