6-(phenylsulfonylmethyl)-4-(2,2,2-trifluoroethyl)-6-hydroxy-1,2-dimethyl-1,6-dihydro-pyridazin-3-one 在
silica gel 作用下,
生成
6-(phenylsulfonylmethyl)-4-(2,2,2-trifluoroethylidene)-1,2-dimethyl-1,4-dihydropyridazin-3-one 、
6-(phenylsulfonylmethylidene)-4-(2,2,2-trifluoroethyl)-1,2-dimethyl-1,6-dihydropyridazin-3-one