A new and facile access to the 2-(indol-3-yl)-3-nitriloquinolines based on Friedländer annulations
摘要:
Preparation of 2-(indol-3-yl)-3-nitriloquinolines via Friedlander quinoline synthesis using 3-cyanoacetylindoles possessing an alpha-methylene group and ortho-amino arylketones have been described. This reaction took place in PEG-400 as a green solvent and it is catalyzed with polyphosphoric acid (PPA) to give novel types of quinolines containing both indoles and cyano functions in one step under thermal and microwave conditions. (C) 2012 Elsevier Ltd. All rights reserved.