A novel [6+3] cycloaddition of 2-oxyallyl cation and fulveneketene acetal is described which provides a conceptually novel methodology for the synthesis of indan ring systems.
The Electronic Structure and Photochemistry of Group 6 Bimetallic (Fischer) Carbene Complexes: Beyond the Photocarbonylation Reaction
作者:Marta L. Lage、Israel Fernández、María J. Mancheño、Mar Gómez-Gallego、Miguel A. Sierra
DOI:10.1002/chem.200903042
日期:2010.6.11
The UV spectra of Group6 metal carbenecomplexes bearing a CpM(CO)3 (Cp=cyclopentadienyl) moiety bonded to the carbene carbon atom exhibit a redshift of the absorption maxima at higher wavelengths with respect to the parent monometallic complexes. This redshift is partly due to a higher occupation on the pz atomic orbital of the carbene carbon atom. Time‐dependent DFT calculations accurately assign
作者:Hoffmann, Reinhard W.、Riemann, Achim、Mayer, Bernhard
DOI:——
日期:——
Metal-Mediated [6 + 3] Cycloaddition Reactions of Fulvenes. A Novel Approach to Indan Systems
作者:Bor-cherng Hong、Si-shoung Sun、Yann-chien Tsai
DOI:10.1021/jo970984j
日期:1997.10.1
The [6 + 3] cycloaddition of 2-oxyallyl cations to the electron rich fulvene ketene acetal provides an efficient route to the indan skeleton. The structures of these indan adducts were assigned by extensive 2D NMR experiments. Direct hydrolysis of these ketal adducts affords the corresponding diketones or indens. Reaction of the fulvene ketene thioacetal as well as the tandem [6 + 3]-[4 + 3] cycloadditions were also studied. A mechanism is proposed which may account for the origin of stereo-and regioselectivity in this cycloaddition.
[6+4] Cycloaddition reactions of acceptor thiophene dioxides: The synthesis of substituted azulenes
作者:A. M. Moiseev、E. S. Balenkova、V. G. Nenajdenko
DOI:10.1007/s11172-006-0227-x
日期:2006.1
Abstract[6+4] Cycloaddition reactions of functionalized thiophene dioxides with various fulvenes provided the corresponding azulenes. The observed regiochemistry was explained in terms of the HOMO—LUMO orbital coefficients.