Sodium Hydroxide → HCID 68514256, compound

Participants

Reaction Steps

Ethyl 7-fluoro-3-oxoheptanoate (0.920 g, 4.84 mmol, 1.17 eq.) obtained in Example 108a) and 4-azido-N-ethylbenzamide (0.790 g, 4.15 mmol) were dissolved in ethanol (25 ml), sodium ethoxide (366 mg, 4.84 mmol, 1.17 eq.) was added, and the mixture was stirred at room temperature for 30 min, and then at 60° C. for 11 hr. 1N Aqueous sodium hydroxide solution (4.15 ml, 1.0 eq.) was added to the reaction mixture and the mixture was further stirred for 1 hr. Water (20 ml) was added to the reaction mixture, ethanol was evaporated, and washed with ethyl acetate-hexane (1:1, 50 ml). The organic layer was extracted with 2% aqueous sodium carbonate solution (20 ml). The aqueous layers were combined, and acidified (pH<3) with 6N hydrochloric acid. The precipitate was collected by filtration, washed with water and dried to give the title compound as a pale-gray powder (1.26 g, 3.77 mmol, 90.8%).

Provenance & Evidence