5-氯-2-碘嘧啶 、 1-(4-(methylsulfonyl)phenyl)-6-oxo-4-(piperidin-4-yloxy)-1,6-dihydropyridazine-3-carbonitrile hydrochloride 在
N,N-二异丙基乙胺 作用下,
以
N-甲基吡咯烷酮 为溶剂,
以75%的产率得到4-(1-(5-chloropyrimidin-2-yl)piperidin-4-yloxy)-1-(4-(methylsulfonyl)phenyl)-6-oxo-1,6-dihydropyridazine-3-carbonitrile