反应详情

A mixture of 7.9 parts of ethyl 3-oxo-1-pyrrolidinecarboxylate, 5.35 parts of 3-methylbenzenamine, 1 part of a solution of thiophene in methanol 4% and 200 parts of methanol was hydrogenated at normal pressure and at 50° C. with 2 parts of palladium-on-charcoal catalyst 10%. After the calculated amount of hydrogen was taken up, the catalyst was filtered off and the filtrate was evaporated, yielding 12.4 parts (100%) of ethyl 3-[(3-methylphenyl)amino]-1-pyrrolidinecarboxylate as a residue (intermediate 19).

1. filtrationthe catalyst was filtered off
2. customthe filtrate was evaporated