Intermolecular Dehydrative Coupling Reaction of Aryl Ketones with Cyclic Alkenes Catalyzed by a Well-Defined Cationic Ruthenium−Hydride Complex: A Novel Ketone Olefination Method via Vinyl C−H Bond Activation
作者:Chae S. Yi、Do W. Lee
DOI:10.1021/om100051h
日期:2010.4.26
The cationic ruthenium hydride complex[(eta(6)-C(6)H(6))-(PCy(3))(CO)RuH](+)BF(4)(-) was found to be a highly effective catalyst for the intermolecular olefination reaction of aryl ketones with cycloalkenes. The preliminary mechanistic analysis revealed that an electrophilic ruthenium vinyl complex is the key species fir mediating both vinyl C-H bond activation and the dehydrative olefination steps of the coupling reaction.
Titanocene-Catalyzed Cyclocarbonylation of <i>o</i>-Allyl Aryl Ketones to γ-Butyrolactones
作者:Natasha M. Kablaoui、Frederick A. Hicks、Stephen L. Buchwald
DOI:10.1021/ja970115b
日期:1997.5.1
A method for the transformation of o-allyl aryl ketones to γ-butyrolactones using a catalytic amount of Cp2Ti(PMe3)2 or Cp2Ti(CO)2 is described. This catalytic “hetero Pauson−Khand”-type process proceeds via the carbonylation of an oxatitanacycle followed by thermally-induced reductive elimination to form a γ-butyrolactone and to regenerate the catalyst. We have investigated the scope and limitations