Brønsted Acid-Catalyzed Straightforward Synthesis of Benzo[<i>b</i>]carbazoles from 2,3-Unsubstituted Indoles
                                
                                    
                                        作者:Anisley Suárez、Patricia García-García、Manuel A. Fernández-Rodríguez、Roberto Sanz                                    
                                    
                                        DOI:10.1002/adsc.201300868
                                    
                                    
                                        日期:2014.2.10
                                    
                                    AbstractDescribed is a general and efficient synthesis of valuable benzo[b]carbazoles by Brønsted acid‐catalyzed reactions between simple C‐2,C‐3‐unsubstituted indoles and ortho‐[α‐(hydroxy)benzyl]benzaldehyde acetals. Highly selective migration processes are involved as key steps in the overall cascade sequence that involves the one‐pot formation of two new bonds and a cycle in a regioselective fashion.magnified image