6-chloro-N-[1-(chloromethyl)-2-(2,4-dimethylphenyl)ethyl]-N’-hydroxy-3-[3-(trifluoromethyl)phenoxy]pyridazine-4-carboxamidine 在
potassium tert-butylate 作用下,
以
乙腈 为溶剂,
反应 1.5h,
以43%的产率得到rac-3-[6-chloro-3-[3-(trifluoromethyl)phenoxy]pyridazin-4-yl]-5-[(2,4-dimethyl-phenyl)methyl]-5,6-dihydro-4H-1,2,4-oxadiazine