作者:Bastien Michelet、Ugo Castelli、Emeline Appert、Maude Boucher、Kassandra Vitse、Jérôme Marrot、Jérôme Guillard、Agnès Martin-Mingot、Sébastien Thibaudeau
DOI:10.1021/acs.orglett.0c01301
日期:2020.7.2
N-(arenesulfonyl)-aminoalcohols derived from readily available ephedrines or amino acids undergo an intramolecular Friedel–Crafts reaction to afford enantiopure benzosultams bearing two adjacent stereocenters in high yields with fully controlled diastereoselectivity. Low-temperature NMR spectroscopy demonstrated the crucial role played by the conformationally restricted chiral dicationic intermediates.
通过超强酸活化,源自易于获得的麻黄碱或氨基酸的N-(芳烃磺酰基)-氨基醇会经历分子内Friedel-Crafts反应,以高产率得到对映体纯的苯并阿苏二胺,并具有完全受控的非对映选择性,并带有两个相邻的立体中心。低温NMR光谱表明,构象受限的手性双效中间体具有重要作用。