、                                                                                      
5-<(4,4-Dimethyl-5-methylen-7-pyrrolin-2-yl)methylen>-4,4-dimethyl-2-pyrrolidi-non                                                                                                                                                              在
                                                                                                                                                                                 
碘                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                                                        以82%的产率得到5-[5-[5-[3,3-Dimethyl-5-oxo-pyrrolidin-(2Z)-ylidenemethyl]-3,3-dimethyl-3,4-dihydro-pyrrol-(2Z)-ylidenemethylsulfanyl]-3,4-dimethyl-pyrrol-(2Z)-ylidenemethyl]-3,4-dimethyl-1H-pyrrole-2-carbonitrile