Microwave-assisted synthesis of indole-derivatives via cycloisomerization of 2-alkynylanilines in water without added catalysts, acids, or bases
                                
                                    
                                        作者:Adriano Carpita、Arianna Ribecai                                    
                                    
                                        DOI:10.1016/j.tetlet.2009.09.135
                                    
                                    
                                        日期:2009.12
                                    
                                    An unprecedented green methodology is described for the preparation of differently substituted indoles via microwave-assisted cycloisomerization of 2-alkynylaniline derivatives in water. Moderate to good yields in the cyclization can be achieved for a variety of 2-aminoaryl alkynes. Reactions are run without any added metal catalyst, acid, or base, and do not take place by applying conventional heating. (C) 2009 Elsevier Ltd. All rights reserved.