反应详情

Under a nitrogen atmosphere, to a cold (0° C.), stirring solution of 3-buten-1-ol (2.16 g, 30.0 mmol), pyridine (9 mL), and methylene chloride (30 mL) was added tert-butyldimethylsilyl chloride (4.53 g, 30.1 mmol) purchased from Aldrich Chemical Company. The ice-bath was removed and the mixture was allowed to stir 1 h at room temperature. The mixture, containing a white precipitate, was poured into water (60 mL) and shaken. The methylene chloride layer was separated from the aqueous layer, and the aqueous layer extracted with methylene chloride (30 mL). The two resulting organic extracts were combined, washed twice with water, dried (Na2SO4), filtered, and evaporated to give 8.94 g of crude product. Vacuum distillation afforded several fractions, the fraction with bp 80°-82° C. at 35 mm Hg was collected to give 3.14 g (56.3%) of product as an oil. 1H NMR (CDCl3): δ 5.86-5.73 (m, 1H), 5.08-4.98 (m, 2H), 3.64 (t, 2H), 2.29-2.22 (m, 2H), 0.87 (s, 9H), 0.03 (s, 6H).

1. customThe ice-bath was removed
2. additionThe mixture, containing a white precipitate
3. additionwas poured into water (60 mL)
4. stirringshaken
5. customThe methylene chloride layer was separated from the aqueous layer
6. extractionthe aqueous layer extracted with methylene chloride (30 mL)
7. washwashed twice with water
8. dry with materialdried (Na2SO4)
9. filtrationfiltered
10. customevaporated
11. customto give 8.94 g of crude product
12. distillationVacuum distillation
13. customafforded several fractions
14. customthe fraction with bp 80°-82° C. at 35 mm Hg was collected