Ruthenium-Catalyzed Asymmetric [2 + 2] Cycloadditions between Chiral Acyl Camphorsultam-Substituted Alkynes and Bicyclic Alkenes
作者:Jordan Goodreid、Karine Villeneuve、Emily Carlson、William Tam
DOI:10.1021/jo501594g
日期:2014.11.7
Ruthenium-catalyzed asymmetric [2 + 2] cycloadditions between chiral acyl camphorsultam-functionalized alkynes and bicyclic alkenes were examined, providing adducts with complete exo stereoselectivity in good overall yield and enantioselectivity (up to 99% and 166:1, respectively), as well as appreciable diastereoselectivity (up to 163:1). The diastereoselectivity showed dependence on the solvent and
钌催化不对称[2 + 2]之间环加成手性酰基樟脑磺基官能化的炔烃和双环烯烃进行了检查,提供与完整的加合物外良好总产率和对映选择性的立体选择性(高达99%和166:分别1日),以及表现出非对映选择性(高达163:1)。非对映选择性显示出取决于溶剂和温度,以及反应的炔烃和双环烯烃组分的取代模式。通常,对于在醚溶剂中和在较低温度下在N-丙炔基樟脑和双环烯烃之间进行的反应,观察到较高的非对映选择性。