8-nitro-6-{4-[N-methyl-N-(2-phenylethyl)amino]-1-piperidinylcarbonyl}-3,4-dihydrocarbostyril → 8-amino-6-{4-[N-methyl-N-(2-phenylethyl)amino]-1-piperidinylcarbonyl}-3,4-dihydrocarbostyril

Participants

Reaction Steps

0.5 g of 5% palladium-carbon was suspended in 0 ml of ethanol. Thereto was added 5 g of 8-nitro-6-{4-[N-methyl-N-(2-phenylethyl)amino]-1-piperidinylcarbonyl}-3,4-dihydrocarbostyril. The mixture was subjected to catalytic reduction at 30°-40° C. at normal pressure in a water bath. After the completion of hydrogen absorption, the reaction mixture was filtered to remove the catalyst. The catalyst was washed with ethanol. The filtrate and the washings were mixed. The mixture was subjected to distillation to remove the solvent to obtain 4.6 g of 8-amino-6-{4-[N-methyl-N-(2-phenylethyl)amino]-1-piperidinylcarbonyl}-3,4-dihydrocarbostyril as a white amorphous.

Provenance & Evidence