反应详情

A suspension of 100 g (0.52 moles) of 3-nitrocinnamic acid in 800 ml glacial acetic acid and 100 ml of methanol was hydrogenated at 50 pounds per square inch over 2.5 g 10% palladium on carbon until four equivalents of hydrogen were absorbed. The catalyst was filtered off, the filtrates combined and the solvent was concentrated in vacuo leaving a brown glass of 3-aminobenzenepropanoic acid. To this was added 1 liter of ethanolic hydrochloric acid which was brought to reflux for five hours. The solvent was evaporated off in vacuo leaving a purple solid. Recrystallization from ethyl acetate yielded 88.0 g of ethyl 3-aminobenzenepropanoate hydrochloride, mp 132°-135° C., (74% yield).

1. customwere absorbed
2. filtrationThe catalyst was filtered off
3. concentrationthe solvent was concentrated in vacuo