An unexpected isomerization of azomethine ylides generated in situ from isatin with indoline-2-carboxylic acid has been disclosed, providing direct access to N-functionalized indole scaffolds. This protocol has good functional group tolerance and provides various 3-(1H-indol-1-yl)indolin-2-one derivatives in moderate to high yields simply by using alcohol as the solvent, with no additional additive
已经公开了由
靛红与二氢
吲哚-2-羧酸原位产生的偶氮甲碱叶立德的意想不到的异构化,提供了对N-官能化
吲哚支架的直接途径。该方案具有良好的官能团耐受性,只需使用
乙醇作为溶剂即可以中等到高产率提供各种3-(1 H-
吲哚-1-基)
吲哚啉-2-酮衍
生物,无需额外的添加剂。