New ThiazolineâOxazoline Ligands and Their Application in the Asymmetric FriedelâCrafts Reaction
作者:Seán C. McKeon、Helge Müller-Bunz、Patrick J. Guiry
DOI:10.1002/ejoc.200900683
日期:2009.10
Six members of a novel non-C2-symmetric ligand class incorporating an oxazoline and thiazoline unit have been prepared in a four-step, high-yielding and convergent synthesis, in which the key step is a microwave-assisted palladium-catalyzed aryl amination. The new ligands induced enantiomeric excesses of up to 76 % in the asymmetric Friedel–Crafts reaction.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451
在四步、高产率和收敛合成中制备了包含恶唑啉和噻唑啉单元的新型非 C2 对称配体类的六个成员,其中关键步骤是微波辅助钯催化的芳基胺化。新配体在不对称 Friedel-Crafts 反应中诱导了高达 76% 的对映体过量。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)