Dimethylformamide → Ethyl 3-[(tert-butoxycarbonyl)(2-methoxyethyl)amino]benzoate

Participants

Reaction Steps

To a mixture of ethyl 3-[(tert-butoxycarbonyl)amino]benzoate (3.8 g) and DMF (20 ml) were added 60% sodium hydride (1.1 g) and 2-bromoethylmethyl ether (3.9 g) under ice-cooling, followed by stirring at room temperature over one night. To the reaction mixture were added 60% sodium hydride (0.28 g) and 2-bromoethylmethyl ether (0.98 g), followed by stirring at room temperature for 6 hours. Water and ethyl acetate were added thereto, and the organic layer was then separated, washed with 1 M hydrochloric acid and saturated brine in this order, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain ethyl 3-[(tert-butoxycarbonyl)(2-methoxyethyl)amino]benzoate (2.7 g).

Provenance & Evidence