5-(3,4-dimethoxyphenyl)-4,4-dimethyl-2-(piperidin-4-yl)-2,4-dihydro-3H-pyrazol-3-one hydrochloride 、
间硝基苯甲酰氯 在
5-(3,4-dimethoxyphenyl)-4,4-dimethyl-2-{1-[(3-nitrophenyl)carbonyl]piperidin-4-yl}-2,4-dihydro-3H-pyrazol-3-one 、 crude product 、 silica gel 、
ethyl acetate dichloromethane 、
乙酸乙酯 、
乙醚 作用下,
以to yield 5-(3,4-dimethoxyphenyl)-4,4-dimethyl-2-{1-[(3-nitrophenyl)carbonyl]piperidin-4-yl}-2,4-dihydro-3H-pyrazol-3-one as the product的产率得到5-(3,4-dimethoxyphenyl)-4,4-dimethyl-2-{1-[(3-nitrophenyl)carbonyl]piperidin-4-yl}-2,4-dihydro-3H-pyrazol-3-one