反应详情

A solution of 1-diethylamino-4-acetoxy-2-nonyne (50.6 g., 0.20 mole) and cyanogen bromide (21.2 g., 0.20 mole) in ether (250 ml.) is allowed to stand at 25°-27° for 18 hours. The ether solution is washed with 5% hydrochloric acid solution, water, and brine and dried over sodium sulfate. The ether is evaporated and the residual oil distilled. After a forerun of diethylcyanamide, there is collected 34.1 g. (65%) of 1-bromo-4-acetoxy-2-nonyne, b.p. 97°-105°/0.2 mm.

1. washThe ether solution is washed with 5% hydrochloric acid solution, water, and brine
2. dry with materialdried over sodium sulfate
3. customThe ether is evaporated
4. distillationthe residual oil distilled
5. customAfter a forerun of diethylcyanamide, there is collected 34.1 g