3-Nitrophthalic anhydride → HCID 22241217, compound

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Reaction Steps

A solution of 2,6-dioxo-3-benzyloxycarbonylamino-5-acetoxypiperidine (9 g, 28.2 mmol) and Pd/C (10%, 0.9 g) in acetic acid (90 mL) is shaken under hydrogen (50–60 psi) for 3 hours. The suspension is filtered through a pad of Celite and washed with acetic acid. To the filtrate is added 3-nitrophthalic anhydride (5.4 g, 28.2 mmol), this mixture is heated at reflux for 18 hours, and the solvent is then removed in vacuo to give 3-(4-nitro-1,3-dioxoisoindolin-2-yl)-2,6-dioxo-5-acetoxypiperidine which can be further purified by column chromatography.

Provenance & Evidence