Getting some closure: Mechanistic studies supported the participation of an oxanickelacycle complex in the hydroacylation step of the title reaction, which proceeds without decarbonylation even in the absence of well‐known chelation assistance by heteroatoms.
A New Method for the Synthesis of Medium- and Large-Sized Carbocycles
作者:Keiichi Masuya、Keiji Tanino、Isao Kuwajima
DOI:10.1055/s-1999-2696
日期:1999.5
A new synthetic method for medium and large-sized carbocycles has been developed. An acyclic compound having an olefin moiety and a 3-(methylthio)allyl acetate moiety at each of the terminal positions was designed as a cyclization precursor. The corresponding allyl cation intermediate, which was generated by treatment with EtAlCl2, underwent cyclization via an intramolecular addition reaction. The ring size of the product, which depends on the reaction site of the allyl cation, can be controlled by changing the nucleophilicity of the terminal olefin moiety.
Watson, Iain D. G.; Ritter, Stefanie; Toste, F. Dean, Journal of the American Chemical Society, 2009, vol. 131, p. 2056 - 2057
作者:Watson, Iain D. G.、Ritter, Stefanie、Toste, F. Dean
DOI:——
日期:——
Catalytic Carbon−Carbon σ Bond Activation: An Intramolecular Carbo-Acylation Reaction with Acylquinolines
作者:Ashley M. Dreis、Christopher J. Douglas
DOI:10.1021/ja8066308
日期:2009.1.21
Carbon-carbon sigma-bond activation is a contemporary challenge for organometallic chemistry and catalysis. Herein, we disclose a new alkene carboacylation reaction initiated by quinoline-directed, rhodium-catalyzed C-C sigma bond activation. The alkene carboacylation allows for the construction of all-carbon quaternary centers, with a broad substrate scope, providing access to carbocyclic and heterocyclic ring systems in good to excellent yields.
Iridium(I)-Catalyzed Intramolecular Hydrocarbonation of Alkenes: Efficient Access to Cyclic Systems Bearing Quaternary Stereocenters
作者:David F. Fernández、Moisés Gulías、José L. Mascareñas、Fernando López
DOI:10.1002/anie.201705105
日期:2017.8.1
wide variety of cyclic systems featuring methyl-substituted quaternary stereocenters is described. The method relies on the use of a cationic IrI–bisphosphine catalyst, which promotes a carboxamide-assisted activation of an olefinic C(sp2)−H bond followed by exo-cyclization to a tethered 1,1-disubstituted alkene. The extension of the method to aromatic and heteroaromatic C−H bonds, as well as developments