N'-methyl-2-pyridin-3-ylacetohydrazide 、 6-(5-(trifluoromethyl)spiro[chromane-2,4'-piperidin]-1'-yl)pyridazine-3-carbonitrile 在
sodium methylate 、
乙酸酐 作用下,
以
甲醇 为溶剂,
以23%的产率得到1'-[6-[2-Methyl-5-(pyridin-3-ylmethyl)-1,2,4-triazol-3-yl]pyridazin-3-yl]-5-(trifluoromethyl)spiro[3,4-dihydrochromene-2,4'-piperidine]