6-(p-Ethoxyphenyl)-4-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)-4,5-dihydro-3(2H)-pyridazinone 在
tetraphosphorus decasulfide 作用下,
以
xylene 为溶剂,
反应 6.0h,
以69%的产率得到6-(4-Ethoxy-phenyl)-4-(3-methyl-1-phenyl-5-thioxo-4,5-dihydro-1H-pyrazol-4-yl)-2H-pyridazine-3-thione