反应详情

2.0 g (7.7 millimoles) of 3-(p-cyclopropylcarbonylaminobenzoyl)-propionic acid, 0.45 g (9.0 millimoles) of hydrazine hydrate and 20 ml of ethanol are refluxed for 6 hours. The product is filtered off at 10° C. and recrystallized from dimethylformamide/water, giving 1.35 g (68% of theory) of 6-(p-cyclopropylcarbonylaminophenyl)-4,5-dihydro-3(2H)-pyridazinone, as colorless crystals, identical with the compound from Example 1.

1. filtrationThe product is filtered off at 10° C.
2. customrecrystallized from dimethylformamide/water