反应详情

A mixture of 4.5 parts of 3-nitro-4-(propylamino)benzoic acid and 80 parts of methanol is hydrogenated at normal pressure and at room temperature with 2 parts of Raney-nickel catalyst. After the calculated amount of hydrogen is taken up, the catalyst is filtered off, 100 parts of acetic acid are added to the filtrate and the whole is evaporated, yielding 4.5 parts of 3-amino-4-(propylamino)benzoic acid as a residue.

1. filtrationthe catalyst is filtered off
2. addition100 parts of acetic acid are added to the filtrate
3. customthe whole is evaporated