(2Z)-2-[(6-fluoro-1H-indazol-5-yl)methylidene]-3-oxobutan-1-nitrile 、
3-amino-4,4,4-trifluoro-2-butenenitrile 在
crude product 、
acetonitrile-water 、 final mixture 作用下,
以to yield 115 mg (40% of th.) of the racemic title compound的产率得到rac-4-(6-fluoro-1H-indazol-5-yl)-2-methyl-6-(trifluoromethyl)-1,4-dihydropyridine-3,5-dicarbonitrile