Highly efficient regioselective hydrosilylation of allenes using a [(3IP)Pd(allyl)]OTf catalyst; first example of allene hydrosilylation with phenyl- and diphenylsilane
作者:Hosein Tafazolian、Joseph A. R. Schmidt
DOI:10.1039/c4cc09804h
日期:——
A [(3IP)Pd(allyl)]OTf complex was shown to function efficiently and regioselectively in allene hydrosilylation with phenyl- and diphenylsilane. The catalyst also proved to be highly active for allene hydrosilylation employing a wide range of silanes, each of which produced a single regioisomer.
Regioselective Access to α-Vinylsilanes and α-Vinylgermanes by Cobalt-Catalyzed Migratory Hydrofunctionalization of 2-Alkynes
作者:Manoj Kumar Sahoo、Dongwook Kim、Sukbok Chang、Jung-Woo Park
DOI:10.1021/acscatal.1c03769
日期:2021.10.15
While migratory functionalization of alkynes has been recognized as a unique way to access allylic functionalities via π-allyl metal intermediates, hydrofunctionalization of 2-alkynes to afford α-functional olefins has been unexplored. We describe herein the use of a cobalt hydride based system for regioselective migratory hydrofunctionalization of 2-alkynes to furnish α-vinylsilanes and α-vinylgermanes
Ligandless Regioselective Hydrosilylation of Allenes Catalyzed by Gold Nanoparticles
作者:Marios Kidonakis、Manolis Stratakis
DOI:10.1021/acs.orglett.5b02236
日期:2015.9.18
The first example of Au-catalyzed hydrosilylation of allenes is presented using recyclable gold nanoparticles as catalyst, without the requirement of any external ligands or additives. The hydrosilane addition takes place on the more substituted double bond of terminal allenes in a highly regioselective manner. The observed regioselectivity/reactivity modes are attributed to steric and electronic factors.