An improved catalytic method for the synthesis of 3,3-di(indolyl)oxindoles using Amberlyst 15 as a heterogeneous and reusable catalyst in water
作者： Yaghoub Sarrafi , Kamal Alimohammadi , Marzieh Sadatshahabi , Nasibeh Norozipoor
DOI: 10.1007/S00706-012-0723-7
关键词:
摘要: Amberlyst 15 efficiently catalyzed the electro- philic substitution reaction of indoles with isatin derivatives to afford 3,3-di(indolyl)oxindoles in water. An important feature this protocol is 3-methyl-1H-indole isatins give corresponding 3,3-diaryloxindole high yields. The catalyst exhibited remarkable reusable activity.
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