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

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

Procedure: 35 mg of butanoic acid was dissolved in 0.5 mL of 1,4-dioxane, to which 46 mg of N-hydroxysuccinimide and 82 mg of N,N′-dicyclohexylcarbodiimide were added, and stirred at room temperature for 1 hour. The deposit was filtered off, and the solvent was evaporated to obtain 94 mg of butanoic acid 2,5-dioxopyrrolidin-1-yl ester crude product. The crude product was used in the next reaction without further purification. were added The deposit was filtered off the solvent was evaporated