参考标题:Synthesis Of Halomethyl Isoxazoles/cyclic Nitrones Via Cascade Sequence: 1,2-Halogen Radical Shift As A Key Link 作者:Hong-Lei Chen,Dian Wei,Jian-Wu Zhang,Cheng-Lin Li,Wei Yu,Bing Han |发布日期:2018.5.18 摘要:A Novel Iminoxyl Radical-Promoted Dichotomous Regioselective 5-Exo-Trig Cyclization Onto Vinylic Halogen/1,2-Halogen Radical Shift Sequence Is Developed For The Synthesis Of Halomethyl Isoxazoles/cyclic Nitrones Using β-Halo-β,γ- And γ-Halo-γ,δ-Unsaturated Ketoximes As The Substrates And Phi(Oac)2/tempo As The Oxidation System. Dft Calculations Reveal That A Halogen-Bridged Three-Membered Ring Transition