Réaction #1435716

Équation de réaction

sodium cyclopentadienide

2-trimethylsiloxy-1-bromo-ethane

ammonium chloride

→

(2-trimethylsiloxy-ethyl)-cyclopentadiene

Rendement 64.0%

Solvants

tetrahydrofurane

tetrahydrofurane

Conditions de réaction

Traitement

1. 1
   TempératureThe reaction is maintained
2. 2
   ExtractionThe organic phase is extracted
3. 3
   Séchagedried with magnesium sulphate
4. 4
   workup.DISTILLATIONthe volatile part is distilled under vacuum
5. 5
   Autreobtaining an orange oil
6. 6
   workup.DISTILLATIONThis oil is distilled in order
7. 7
   Autreto obtain a colourless oil
8. 8
   Autre(Tb.: 63–65° C., 0.02 bar (15 mmHg.))

Mode opératoire

150 ml of a 2.3 M sodium cyclopentadienide solution in tetrahydrofurane (346 mmol) is slowly added to a solution of 68.2 g (346 mmol) 2-trimethylsiloxy-1-bromo-ethane in tetrahydrofurane. The immediate formation of a pinkish solid is observed. The reaction is maintained under stirring for 12 hours. Then, an ammonium chloride aqueous solution is added. The organic phase is extracted, dried with magnesium sulphate and the volatile part is distilled under vacuum, obtaining an orange oil. This oil is distilled in order to obtain a colourless oil. (Tb.: 63–65° C., 0.02 bar (15 mmHg.)). (40.3 g, 221 mmol. Yield:64%). 1H-NMR (CDCl3): 6.50–6.00 (m,3H), 3.75 (m, 2H), 2.95 (m, 2H), 2.65 (m, 2H), 0.15 (s, 9H).

Source