Recent Development of Regio‐ and Stereoselective Aminohalogenation Reaction of Alkenes
作者:Guigen Li、S. R. S. Saibabu Kotti、Cody Timmons
DOI:10.1002/ejoc.200600990
日期:2007.6
This microreview presents the development of the catalytic aminohalogenation of olefins. The olefin substrates include electron-deficient and functionalized ones, such as α,β-unsaturated esters, α,β-unsaturated ketones and α,β-unsaturated nitriles. In addition, the first asymmetric aminohalogenation by the use of Evans chiral auxiliaries is also discussed. The convincing evidence is provided to support
Synthesis of Novel Dimeric Allylpalladium(II) Complexes from PdCl<sub>2</sub>-Promoted Ring-Opening Reactions of Vinylidenecyclopropanes
作者:Xingxing Gu、Feijun Wang、Ming-hui Qi、Li-xiong Shao、Min Shi
DOI:10.1021/om801117g
日期:2009.3.9
Novel dimeric allylpalladium(II) complexes have been successfully synthesized from the transition metal PdCl2-promoted ring-opening reactions of VDCPs 1 in good yields. These dimeric allylpalladium(II) complexes have been characterized by X-ray crystal structure diffraction.
FeCl<sub>3</sub>-Catalyzed Aminohalogenation of Arylmethylenecyclopropanes and Arylvinylidenecyclopropanes and Corresponding Mechanistic Studies
作者:Qingjiang Li、Min Shi、Cody Timmons、Guigen Li
DOI:10.1021/ol052806f
日期:2006.2.1
The aminochlorination of methylenecyclopropanes (MCPs) 1 and vinylidenecyclopropanes (VCPs) has been explored with use of FeCl3 (20 mol %) as a Lewis acid catalyst in acetonitrile under convenient mild conditions. The stereochemistry has been unambiguously confirmed by X-ray structural analysis. The aziridinium-based mechanism, accounting for both regio- and stereoselectivity, has been carefully studied. A linear free-energy relationship study of this reaction confirms consistency with the Hammet equation.