An Efficient One-Step Synthesis of Heterobiaryl Pyrazolo[3,4-<i>b</i>]pyridines via Indole Ring Opening
                                
                                    
                                        作者:Sanghee Lee、Seung Bum Park                                    
                                    
                                        DOI:10.1021/ol902147u
                                    
                                    
                                        日期:2009.11.19
                                    
                                    A mild one-step synthetic method to access privileged heterobiaryl pyrazolo[3,4-b]pyridines from indole-3-carboxaldehyde derivatives and a variety of aminopyrazoles has been developed. This novel method constructs heterobiaryls with the wide scope of substrate generality and excellent regioselectivity via indole ring opening.