Ethyl bromoacetate → HCID 54551452, compound

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Reaction Steps

4-Methoxy-2-nitro-N-[2-(4nitrophenyl)ethyl]-3-pentyloxybenzamide obtained in Example 2-47, THF (1 ml) and sodium hydride (13.3 mg, 0.556 mmol) were mixed, and the mixture was stirred for 5 minutes. Ethyl bromoacetate (0.0617 ml, 0.556 mmol) was added, and the mixture was stirred at 90° C. for 5.5 hours. Then, sodium hydride (6.7 mg, 0.278 mmol) and ethyl bromoacetate (6.7 mg, 0.278 mmol) were further added, and the mixture was stirred at 90° C. for 6.5 hours. To the mixture was added water (3 ml) to stop the reaction, and the organic layer was extracted 3 times with ethyl acetate (5 ml). The organic layers were combined and dried over anhydrous magnesium sulfate. The drying agent was fitered off, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by column chromatography on silica gel (hexane/ethyl acetate=4/1-2/3) to give ethyl{ (4-methoxy-2-nitro-3-pentyloxybenzoyl)-[2-(4nitrophenyl)ethyl]amino}acetate (0.137 g, 68%) as a pale-yellow oil.

Provenance & Evidence