4-Methoxy-N-[2-nitro-4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]benzamide → N-[2-Amino-4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]-4-methoxy-benzamide

Participants

Reaction Steps

203 gm of 5-methyl-6-[3-nitro-4-(4-methoxy-benzoylamino)-phenyl]-4,5-dihydro-2H-pyridazine-3-one were dissolved in 1.7 liters of dimethylformamide, and the solution was treated with hydrogen in the presence of 20 gm of 10% palladium charcoal for 2 hours at a pressure of 5 bar. After filtering off the catalyst, the filtrate was poured into 7.5 liters of ice water. The precipitated product was dried at 120° C.

Provenance & Evidence