(Z)-N'-(1-(3-bromophenyl)-2,2-dimethylpent-4-en-1-ylidene)-2,2,2-trichloroacetohydrazide   、                                                                                      2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate                                                                                                                                                              在
                                                                                                                                                                                 
caesium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        以78%的产率得到(5-(3-bromophenyl)-4,4-dimethyl-2-(((2,2,6,6-tetramethylpiperidin-1-yl)oxy)methyl)-3,4-dihydro-2H-pyrrol-1-ium-1-yl)(2,2,2-trichloroacetyl)amide