(E/Z)-N'-(2,2-dimethyl-1-phenylpent-4-en-1-ylidene)-2,2,2-trifluoroacetohydrazide 、 2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
以83%的产率得到(4,4-dimethyl-5-phenyl-2-(((2,2,6,6-tetramethylpiperidin-1-yl)oxy)methyl)-3,4-dihydro-2H-pyrrol-1-ium-1-yl)(2,2,2-trifluoroacetyl)amide