1,2-dihydro-1-hydroxy-4,6-dimethyl-2-oxopyridine-3-cerbonitrile   、                                                                                      
2,2-dimethyl-3-(2',2'-dibromovinyl)-cyclopropane-1-carboxylic acid chloride                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        以69.1%的产率得到(1RS)-cis-(2,2-dibromovinyl)-2,2-dimethyl-cyclopropane-1-carboxylate 1-(3-cyano-4,6-dimethyl-2-oxo)piridyl ester