1-Hydroxybenzotriazole → 2-fluoro-5-nitro-N-(1,3-benzodioxol-5-ylmethyl)benzamide

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Reaction Steps

A mixture of 2-fluoro-5-nitrobenzoic acid (1.00 g), (1,3-benzodioxol-5-ylmethyl)amine (980 mg), 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (1.55 g) and 1-hydroxybenzotriazole (1.09 g) in anhydrous dimethylformamide (10 mL) was stirred for 40 hours at ambient temperature. The mixture was partitioned between water and ethyl acetate. The separated organic layer was washed with an aqueous saturated sodium bicarbonate solution, 1N-hydrochloric acid, water and brine. Then, the resultant was dried over magnesium sulfate and evaporated in vacuo. The residue was triturated with diisopropyl ether to give 2-fluoro-5-nitro-N-(1,3-benzodioxol-5-ylmethyl)benzamide as yellow powders (1.48 g).

Provenance & Evidence