Building block synthesis of predominantly (E) symmetrical and unsymmetrical 1,2-difluorostilbenes from 1,2-dibromo-1,2-difluoroethene
                                
                                    
                                        作者:Said Eddarir、Mohammed Kajjout、Christian Rolando                                    
                                    
                                        DOI:10.1016/j.tet.2013.10.067
                                    
                                    
                                        日期:2013.12
                                    
                                    An efficient synthesis of predominantly (E) symmetrical or unsymmetrical 1,2-difluorostilbenes based on the Suzuki-Miyaura palladium-catalyzed cross-coupling reaction of arylboronic acids with predominantly (E)-1,2-dibromo-1,2-difluoroethene in the presence of Cs2CO3 in toluene is described. The reaction preserved the stereochemistry of the building block and performed in good yield independently of the electron-withdrawing or electron-donating character of the substituents. (C) 2013 Elsevier Ltd. All rights reserved.