Phthalic Anhydride → 7-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)heptanoic acid

Participants

Reaction Steps

A mixture of phthalic anhydride (5.3 g.) and 7-aminoheptanoic acid (5.8 g.) was heated at 185°-190° C. for 40 minutes and then cooled. The cooled partially solidified product was dissolved in ethyl acetate and the solution washed several times with dilute HCl. The organic layer was dried (MgSO4), filtered and evaporated to dryness and the residue recrystallized from acetic acid to give 7-phthalimidoheptanoic acid (5 g.), m.p. 112°-115° C.

Provenance & Evidence