8-Methoxy-6-nitro-3,4-dihydroquinolin-2(1H)-one → 6-Amino-8-methoxy-3,4-dihydrocarbostyril

Participants

Reaction Steps

6-Nitro-8-methoxy-3,4-dihydrocarbostyril (2 g) and 5% palladium-carbon (0.2 g) were added in ethanol (50 ml) and catalytic reduction was conducted at a hydrogen gas pressure of 3 kg/cm2 for 1 hour. Then, the reaction mixture was filtered and the filtrate was concentrated. The residue was recrystallized from benzene to give 1.7 g of 6-amino-8-methoxy-3,4-dihydrocarbostyril.

Provenance & Evidence