1-(2,4-Dichlorophenyl)-2,3,3-trimethylbut-1-ene   、                                                                                      
N-溴代丁二酰亚胺(NBS)   、                                                                                      
偶氮二异丁腈                                                                                                                                                                                              以
                                                                                         
1,1,2,2-四氯乙烷                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以20 g (62.1% of theory) of 2-bromomethyl-1-(2,4-dichlorophenyl)-3,3-dimethylbut-1-ene of boiling point 108° C. at 0.13 mbar are obtained的产率得到1-[2-(Bromomethyl)-3,3-dimethylbut-1-en-1-yl]-2,4-dichlorobenzene