تفاعل #482012

معادلة التفاعل

3-buten-1-ol

pyridine

tert-butyldimethylsilyl chloride

→

product

المردود 56.3%

4-[(Tert-Butyldimethylsilyl)oxy]-1-butene

المردود 56.3%

المذيبات

methylene chloride

ظروف التفاعل

المعالجة

1. 1
   أخرىThe ice-bath was removed
2. 2
   workup.ADDITIONThe mixture, containing a white precipitate
3. 3
   workup.ADDITIONwas poured into water (60 mL)
4. 4
   workup.STIRRINGshaken
5. 5
   أخرىThe methylene chloride layer was separated from the aqueous layer
6. 6
   استخلاصthe aqueous layer extracted with methylene chloride (30 mL)
7. 7
   غسيلwashed twice with water
8. 8
   تجفيفdried (Na2SO4)
9. 9
   ترشيحfiltered
10. 10
    أخرىevaporated
11. 11
    أخرىto give 8.94 g of crude product
12. 12
    workup.DISTILLATIONVacuum distillation
13. 13
    أخرىafforded several fractions
14. 14
    أخرىthe fraction with bp 80-82° C. at 35 mm Hg was collected

الإجراء التجريبي

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).

المصدر