反应详情

温度

4 °C

6-Bromo-1-(t-butyldimethylsilyloxy)hexane (20 g, 110.42 mmol) was dissolved in dry dimethyl sulfoxide (500 ml) and tetrahydrofuran (50 ml) and cooled to 0° C. under argon atmosphere, to which was added lithium acetylide ethylene diamine complex (28.0 g, 304.74 mmol) and the resulting solution was stirred for 1 day at 4° C. After the reaction was completed, the mixture was poured in ice-water and extracted with ethyl ether. The organic solvent was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. This crude product was purified by column chromatography on silica gel, eluting with ethyl acetate:n-hexane=1:40. After removal of the solvent, 18 g of the title compound was obtained as colorless oil. (yield: 73.8%)

1. additionwas added lithium acetylide ethylene diamine complex (28.0 g, 304.74 mmol)
2. extractionextracted with ethyl ether
3. dry with materialThe organic solvent was dried over anhydrous magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThis crude product was purified by column chromatography on silica gel
6. washeluting with ethyl acetate
7. customAfter removal of the solvent