2-氯嘧啶 、
3-amino-5-(4-methoxy-phenyl)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one 在
5-(4-methoxy-phenyl)-3-(pyrimidin-2-ylamino)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one 作用下,
以
N-甲基吡咯烷酮 、
甲醇 为溶剂,
反应 5.0h,
以to give 25 mg (28%) of pure 5-(4-methoxy-phenyl)-3-(pyrimidin-2-ylamino)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one (I-17) as a solid的产率得到5-(4-methoxy-phenyl)-3-(pyrimidin-2-ylamino)-1,5-dihydro-pyrazolo[4,3-c]pyridazin-6-one