An efficient, general synthesis of 2-substituted 3,6-dihydropyrrolo[3,2-e]indoles involving one-pot Sonogashira coupling and cyclisation
作者:Moumita Rakshit、Taraknath Kundu、Gandhi K. Kar、Manas Chakrabarty
DOI:10.1007/s00706-012-0859-5
日期:2013.5
palladium(0) catalyst and a copper(I) co-catalyst. The reaction involved one-pot Sonogashira coupling/heteroannulation, the first one of its kind in the synthesis of the title compounds. The required amido-iodoindole was prepared smoothly from 5-nitroindole by successive N-protection, reduction of the nitroarene, iodination of the resulting aminoarene and N-trifluoroacetylation. Graphical abstract
摘要在α-α存在下,4-碘-1-(苯磺酰基)-5-(三氟乙酰胺基)吲哚与末端乙炔的反应有效地合成了2-取代的3,6-二氢吡咯并[3,2- e ]吲哚。钯(0)催化剂和铜(I)助催化剂。该反应涉及一锅法Sonogashira偶联/杂环化,这是标题化合物合成中的第一个此类反应。通过连续的N-保护,硝基芳烃的还原,所得氨基芳烃的碘化和N-三氟乙酰化,由5-硝基吲哚平稳地制备所需的酰胺基-碘吲哚。 图形概要