Hydrochloric Acid → 2-(Piperidin-4-yl)isoindoline-1,3-dione hydrochloride

Participants

Reaction Steps

16.0 Grams of 1-benzyl-4-phthalimido-piperidine were dissolved in 200 milliliters of 50% methanol/acetic acid and 25 milliliters of ethereal hydrogen chloride, and were hydrogenated at 60° C. and 60 psi in the presence of 2.0 grams of 10% palladium-on-charcoal catalyst. After 4 hours the reaction mixture was filtered while still hot and addition of ether gave 8.7 grams of 4-phthalimido-piperidine mono-hydrochloride. Melting point: 300° C. with decomposition.

Provenance & Evidence