(2,5-dioxopyrrolidin-1-yl) 2-methoxybenzoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: O-anisic acid (1.0 g), N-hydroxysuccinimide (0.76 g) and water-soluble carbodiimide hydrochloride (1.39 g) were dissolved in methylene chloride (15 ml), and the solution was stirred overnight at room temperature. The precipitate was removed by filtration. The mother liquor was concentrated under reduced pressure, and the residue was crystallized from isopropanol to give 1.47 g of N-(2-methoxybenzoyloxy)succinimide (mp. 180°-182° C.). The precipitate was removed by filtration The mother liquor was concentrated under reduced pressure the residue was crystallized from isopropanol