反应详情

A solution of 2-octyne-1-ol (37.8 g) in ether (150 mL) containing pyridine (3 ml) was cooled to -35° and treated with a solution of phosphorous tribromide (28.9 g) over 45 min. The mixture was then stirred at -30° for 2 hours, 3 hours at room temperature and 1/2 hour at 40°. The reaction mixture was then cooled to room temperature, poured onto ice and extracted with ether. The combined ether extracts were washed with aqueous NaHCO3 solution, brine and dried (MgSO4). Removal of the solvents and distillation of the residue yielded 1-bromo-2-octyne (40.9 g), bp, 106°-110° (25 mmHg).

1. temperaturewas cooled to -35°
2. temperatureThe reaction mixture was then cooled to room temperature
3. additionpoured onto ice
4. extractionextracted with ether
5. washThe combined ether extracts were washed with aqueous NaHCO3 solution, brine
6. dry with materialdried (MgSO4)
7. customRemoval of the solvents and distillation of the residue