The rhodium-catalyzed deoxygenation and borylation of ketones with B2pin2 have been developed, leading to efficient formation of alkenes, vinylboronates, and vinyldiboronates. These reactions feature mild reaction conditions, a broad substrate scope, and excellent functional-group compatibility. Mechanistic studies support that the ketones initially undergo a Rh-catalyzed deoxygenation to give alkenes
Rhodium catalysed dehydrogenative borylation of alkenes: Vinylboronates via C–H activation
作者:Ibraheem A. I. Mkhalid、R. Benjamin Coapes、S. Natasha Edes、David N. Coventry、Fabio E. S. Souza、Rhodri Ll. Thomas、Jonathan J. Hall、Si-Wei Bi、Zhenyang Lin、Todd B. Marder
DOI:10.1039/b715584k
日期:——
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
Synthesis of 1,1-Diboryl Alkenes Using the Boryl-Heck Reaction
作者:Olamide O. Idowu、Jacob C. Hayes、William B. Reid、Donald A. Watson
DOI:10.1021/acs.orglett.1c01567
日期:2021.6.18
The synthesis of 1,1-diboryl alkenes from terminal alkenes is reported. 1,1-Regioselective addition is observed for both conjugated and unconjugated alkenes, allowing for a single method to prepare a wide range of 1,1-diboryl alkenes.