反应详情

In 50 ml of N,N-dimethylformamide were dissolved 1.5 g (5.9 m mol) of 4-chloro-2-(4-chlorophenyl)-5-hydroxy-3(2H)-pyridazinone and 1.3 g (6.6 m mol) of 2,4-dichlorobenzyl chloride, and thereto was added 0.7 g of triethylamine. The reaction mixture was heated under stirring on an oil bath at 100° to 120° C. for 7 hours. After allowing to cool, the reaction mixture was poured into 200 ml of water and the precipitated solid was taken out by filtration, washed with water, dried and then recrystallized from benzene to give 1.7 g of the intended compound.

1. temperatureThe reaction mixture was heated
2. temperatureto cool
3. filtrationthe precipitated solid was taken out by filtration
4. washwashed with water
5. customdried
6. customrecrystallized from benzene