(Z)-2,2,2-trichloro-N'-(2,2-dimethyl-1-phenylbut-3-en-1-ylidene)acetohydrazide 、 2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
以93%的产率得到2,2,2-trichloro-1-[4,4-dimethyl-5-phenyl-3-[(2,2,6,6-tetramethylpiperidin-1-yl)oxymethyl]-3H-pyrazol-2-yl]ethanone