Alkene Isomerization–Hydroboration Promoted by Phosphine-Ligated Cobalt Catalysts
摘要:
Generated in situ from air-stable cobalt precursors or readily synthesized using NaHBEt3, (PPh3)(3)CoH(N-2) was found to be an effective catalyst for the hydroboration of alkenes. Unlike previous base-metal catalysts for alkene isomerizationhydroboration which favor the incorporation of boron at terminal positions, (PPh3)(3)CoH(N-2) promotes boron incorporation adjacent to pi-systems even in substrates where the alkene is at a remote position, enabling a unique route to 1,1-diboron compounds from alpha,omega-dienes.
Bis(imino)pyridine Cobalt-Catalyzed Dehydrogenative Silylation of Alkenes: Scope, Mechanism, and Origins of Selective Allylsilane Formation
作者:Crisita Carmen Hojilla Atienza、Tianning Diao、Keith J. Weller、Susan A. Nye、Kenrick M. Lewis、Johannes G. P. Delis、Julie L. Boyer、Aroop K. Roy、Paul J. Chirik
DOI:10.1021/ja5060884
日期:2014.8.27
aryl-substituted bis(imino)pyridine cobalt methyl complex, ((Mes)PDI)CoCH3 ((Mes)PDI = 2,6-(2,4,6-Me3C6H2-N═CMe)2C5H3N), promotes the catalytic dehydrogenativesilylation of linear α-olefins to selectively form the corresponding allylsilanes with commercially relevant tertiary silanes such as (Me3SiO)2MeSiH and (EtO)3SiH. Dehydrogenativesilylation of internal olefins such as cis- and trans-4-octene
Vinyl- and allylsilanes from the rhodium(I)-catalyzed hydrosilylation of 1-alkenes with trialkylsilanes
作者:Anatoli Onopchenko、Edward T. Sabourin、David L. Beach
DOI:10.1021/jo00192a030
日期:1984.9
Alkene Isomerization–Hydroboration Promoted by Phosphine-Ligated Cobalt Catalysts
作者:Margaret L. Scheuermann、Elizabeth J. Johnson、Paul J. Chirik
DOI:10.1021/acs.orglett.5b01135
日期:2015.6.5
Generated in situ from air-stable cobalt precursors or readily synthesized using NaHBEt3, (PPh3)(3)CoH(N-2) was found to be an effective catalyst for the hydroboration of alkenes. Unlike previous base-metal catalysts for alkene isomerizationhydroboration which favor the incorporation of boron at terminal positions, (PPh3)(3)CoH(N-2) promotes boron incorporation adjacent to pi-systems even in substrates where the alkene is at a remote position, enabling a unique route to 1,1-diboron compounds from alpha,omega-dienes.
From Remote Alkenes to Linear Silanes or Allylsilanes depending on the Metal Center
作者:Susan Azpeitia、Antonio Rodriguez-Dieguez、María A. Garralda、Miguel A. Huertos
DOI:10.1002/cctc.201800159
日期:2018.5.24
allylsilanes from remote alkenes was explored. The cationic, unsaturated, 16‐electron hydrido–silyl–RhIII complex was found to be an efficient catalyst for a tandem catalytic alkene isomerization–hydrosilylation reaction at room temperature under solvent‐free conditions. The analogous hydrido–silyl–IrIII complex was selective for dehydrogenativesilylation, which led to the formation of terminal allylsilanes.