4-chloro-2-methyl-5,8-dihydropyrano[3,4-d]pyridazine-1,7-dione 、
3-(difluoromethyl)tetrahydrofuran-3-amine hydrochloride 在
溶剂黄146 作用下,
以0.11 g的产率得到2-(6-chloro-5-(hydroxymethyl)-2-methyl-3-oxo-2,3-dihydropyridazin-4-yl)-N-(3-(difluoromethyl)tetrahydrofuran-3-yl)acetamide