2-(3-ethylsulfonyl-5-hydroxycarbonylpyridin-2-yl)-3-methyl-6-pentafluoroethyl-3H-imidazo[4,5-C]pyridazine 、
methylthioethoxyamine hydrochloride 在
吡啶 、
4-二甲氨基吡啶 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
氯仿 为溶剂,
以1.09 g的产率得到5-ethylsulfonyl-6-[7-methyl-3-(1,1,2,2,2-pentafluoroethyl)imidazo[4,5-c]pyridazin-6-yl]-N-(2-methylsulfanylethoxy)pyridine-3-carboxamide