反应详情

A 5 L round bottom three-necked flask, equipped with a heating mantle, an overhead stirrer, and a thermometer, is charged with 150 gm bromoethylmannose (525 mmol). The oil is dissolved in 2 L water and treated with 68.3 gm sodium azide (1.05 mol, 2 equiv.; 65 gm/mol; Alfa-Aesar) followed by 7.9 gm sodium iodide (52.5 mmol, 0.08 equiv.; 149.89 gm/mol; Alfa-Aesar) and the solution warmed to 50 C and stirred overnight. The solution is cooled to room temperature and concentrated to dryness on the rotovap. The solid residue is digested with 3×500 mL of 5:1 vol. CHCl3:MeOH at 40 C. The combined organic portions are filtered and evaporated to dryness to afford azidoethylmannose as an off-white solid.

1. customA 5 L round bottom three-necked flask, equipped with a heating mantle, an overhead stirrer
2. temperaturethe solution warmed to 50 C
3. concentrationconcentrated to dryness on the rotovap
4. filtrationThe combined organic portions are filtered
5. customevaporated to dryness