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 ring system 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
通过用路易斯酸处理3-羟基取代的1,3-二氢吲哚-2-酮,可以容易地生成准-抗芳香族的2H-吲哚-2-酮环系统。将各种π-亲核试剂逐步加至高反应性2H-吲哚-2-酮体系中可顺利进行,以提供取代的羟吲哚。环化也以分子内方式进行,以高收率得到螺取代的羟吲哚。