Formation of Quaternary Centers by Copper-Catalyzed Asymmetric Conjugate Addition of Alkylzirconium Reagents
作者:Mireia Sidera、Philippe M. C. Roth、Rebecca M. Maksymowicz、Stephen P. Fletcher
DOI:10.1002/anie.201303202
日期:2013.7.29
Pure and simple: Alkylzirconocenes generated in situ from simple alkenes are used in highly enantioselective copper‐catalyzed 1,4‐addition reactions to trisubstituted cyclic enones to generate quaternary centers. These reactions operate at room temperature under a range of conditions and tolerate many functional groups. Cp=cyclopentadienyl, Tf=trifluoromethanesulfonyl.
纯净和简单:由简单烯烃原位生成的烷基锆茂被用于高度对映选择性的铜催化的1,4加成反应,形成三取代的环烯酮,以生成季中心。这些反应在室温下在一定条件下进行,并能耐受许多官能团。Cp =环戊二烯基,Tf =三氟甲磺酰基。