Iron-Catalyzed Intramolecular Perezone-Type [5 + 2] Cycloaddition: Access to Tricyclo[6.3.1.0<sup>1,6</sup>]dodecane
作者:Yongjiang Liu、Xiao Wang、Song Chen、Shaomin Fu、Bo Liu
DOI:10.1021/acs.orglett.8b00989
日期:2018.5.18
An iron-catalyzed perezone-type [5 + 2] cycloaddition toward tricyclo[6.3.1.01,6]dodecane scaffolds is presented, furnishing cycloadducts with two new C–C bonds and three to four stereogenic centers generated with typically good yields and excellent diastereoselectivities. Two independent conditions, catalytic FeCl3/PhCO3tBu (0.5 equiv/1 equiv) and stoichiometric FeCl3(2 equiv), have been respectively
提出了铁催化的过环带型[5 + 2]环向三环[6.3.1.0 1,6 ]十二烷骨架的加成反应,为环加合物提供了两个新的C–C键和三至四个立体异构中心,通常具有良好的收率和优异的生成能力。非对映选择性。催化FeCl 3 / PhCO 3 t Bu(0.5当量/ 1当量)和化学计量FeCl 3(2当量)这两个独立条件已分别证明适用于各种基材。从机理上讲,反应可以通过铁介导的碳阳离子中心的发生而进行,从而触发随后的[5 + 2]环化。进行了环加合物的衍生以证明该方法的适用性。