An efficient synthesis of highly functionalized unsymmetrical biphenyls having substituents on the ortho positions
                                
                                    
                                        作者:Masami Takahashi、Yasunori Moritani、Tsuyoshi Ogiku、Hiroshi Ohmizu、Kazuhiko Kondo、Tameo Iwasaki                                    
                                    
                                        DOI:10.1016/s0040-4039(00)61201-7
                                    
                                    
                                        日期:1992.8
                                    
                                    The highly functionalized unsymmetrical biphenyls having electron-donating and/or electron-withdrawing substituents on the ortho positions were effectively synthesized based on the intramolecular Ullmann coupling reaction directed by salicyl alcohol as a template, followed by selective cleavage of the two ester bonds of S.