Catalytic enantioselective synthesis of macrodiolides and their application in chiral recognition
作者:Wanlong Xiao、Yuhao Mo、Jing Guo、Zhishan Su、Shunxi Dong、Xiaoming Feng
DOI:10.1039/d0sc06162j
日期:——
New types of C2-symmetric chiral macrodiolides are readily obtained via chiral N,N′-dioxide-scandium(III) complex-promoted asymmetric tandem Friedel–Crafts alkylation/intermolecular macrolactonization of ortho-quinone methides with C3-substituted indoles. This protocol provides an array of enantioenriched macrodiolides with 16, 18 or 20-membered rings in moderate to good yields with high diastereoselectivities
通过手性N,N′-二氧化物-scan (III)配合物促进的不对称串联Friedel-Crafts烷基化/邻位分子间大内酯化,很容易获得新型的C 2对称手性大分子二醇。-醌甲基化物与C 3-取代的吲哚。该方案通过调节吲哚C3位置的链长,以中等到良好的产率提供了具有16、18或20元环的对映体富集的大环糊精,具有高的非对映选择性和极好的对映选择性。密度泛函理论计算表明,就动力学和热力学而言,大环的形成比9元环内酯更有利。这些有趣的手性大分子二醇分子的潜在用途在氨基的对映体识别和金属离子的化学识别中得到了证明。