Substitution and Cyclization Reactions Involving the Quasi-Antiaromatic 2<i>H</i>-Indol-2-one Ring System
作者:Dylan B. England、Gokce Merey、Albert Padwa
DOI:10.1021/ol7016438
日期:2007.9.1
The quasi-antiaromatic 2H-indol-2-one ringsystem is readily generated by treating a 3-hydroxy-substituted 1,3-dihydroindol-2-one with a Lewis acid. Stepwise addition of various pi-nucleophiles to the highly reactive 2H-indol-2-one system occurs smoothly to afford substituted oxindoles. The cyclization was also carried out in an intramolecular fashion to give spiro-substituted oxindoles in good yield