作者:Qiyan Wei、Yinggang Luo、Min Zhou、Feiyan Tao、Guoling Zhang                                    
                                    
                                        DOI:10.1081/scc-200050959
                                    
                                    
                                        日期:2005.3
                                    
                                    The coupling reaction of substituted toluenes themselves and the cross-coupling reaction of substituted toluene and aromatic in the presence of bromine in anhydrous CCl4 under irradiation lead to diphenylmethanes with moderate to good yields. The methylene moiety in diphenylmethanes comes from the toluene with fewer electron-donating groups, and regioselectivity was observed.