Asymmetric Synthesis of Indolines through Intramolecular Shifting of Aromatic Sulfinyl Groups. Role of the π,π-Stacking Interactions in these Unusual S<sub>N</sub>Ar Processes
作者:José L. García Ruano、Alejandro Parra、Vanesa Marcos、Carlos del Pozo、Silvia Catalán、Silvia Monteagudo、Santos Fustero、Ana Poveda
DOI:10.1021/ja8096527
日期:2009.7.8
Cyclization of N-aryl substituted 1-aryl-2[2-p-tolylsulfinyl]phenyl propylamines under LDA, LHMDS, or KHMDS provides a new approach for synthesizing optically pure 2,3-disubstituted indolines. Both the scope and the limitations of this method have been investigated. The pi,pi-stacking interactions are crucial for these unprecedented intramolecular S(N)Ar processes, in which a sulfinyl group located
N-芳基取代的 1-芳基-2[2-p-tolylsulfinyl] 苯基丙胺在 LDA、LHMDS 或 KHMDS 下的环化为合成光学纯 2,3-二取代二氢吲哚提供了一种新方法。已经研究了该方法的范围和局限性。pi,pi 堆积相互作用对于这些前所未有的分子内 S(N)Ar 过程至关重要,其中位于轻微失活环上的亚磺酰基在温和条件下被酰胺阴离子取代。提供了支持这些 pi,pi-stacking 相互作用的 X 射线和 NMR 证明。