反应详情

218 g (1 mole) of 1-p-carboxyphenyl-3-methyl-2-pyrazolin-5-one were suspended in 600 ml of dimethylformamide. The mixture obtained was heated with stirring to 100° C., whereupon a solution of 122 g (1mole) of p-hydroxybenzaldehyde in 400 ml of methanol was added. The dissolution of both compounds was complete. The dye started crystallizing after some 30 min. The heating was stopped after 2 h and the reaction mixture was allowed to cool down to room temperature. The dye was filtered with suction and rinsed with methanol.

1. customThe mixture obtained
2. temperaturewas heated
3. additionwas added
4. dissolutionThe dissolution of both compounds
5. customThe dye started crystallizing after some 30 min
6. filtrationThe dye was filtered with suction
7. washrinsed with methanol