Ethylamine → N-ethyl-2-chloro-5-nitrobenzamide

Participants

Reaction Steps

2-Chloro-5-nitrobenzoic acid (20 g, 100 mmol) in THF (200 mL) was treated with carbonyldiimidazole (CDI) (17.8 g, 110 mmol) and triethylamine (16 mL, 110 mmol) at room temperature. After 1 hr, a solution of ethylamine (70% in water, 10 mL) was added and the mixture was stirred for 18 h. Solvent was removed by evaporation and the residue was dissolved in methylene chloride, washed with 3% KOH solution followed by water (three times) until the aqueous phase extracts were colorless. The organic phase was dried over MgSO4, filtered, and the filtrate was concentrated to provide 10.4 g of N-ethyl-2-chloro-5-nitrobenzamide as light yellow crystals.

Provenance & Evidence