Réaction #955967

Équation de réaction

trimethyltin chloride

thieno[3,2-b]thiophene

t-BuLi

trimethyltin chloride

→

2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene

Solvants

tetrahydrofuran

Conditions de réaction

Traitement

1. 1
   AutreIn a 3-neck round bottom flask equipped with an argon inlet
2. 2
   workup.ADDITIONAfter completion of the addition
3. 3
   Températurethen warmed up with an isopropanol bath at room temperature for 30 minutes during which a yellow precipitate
4. 4
   Autreformed
5. 5
   TempératureThe solution was cooled back at −78° C.
6. 6
   TempératureAfter warming to room temperature the solution
7. 7
   workup.STIRRINGwas stirred for 30 minutes
8. 8
   workup.ADDITIONthen was poured into ice-cold water
9. 9
   ExtractionThe aqueous phase was further extracted with hexane
10. 10
    LavageThe combined organic phase were washed with cold water
11. 11
    Séchagethen dried with magnesium sulfate
12. 12
    FiltrationAfter filtration
13. 13
    Autrethe solvent is evaporated under vacuum
14. 14
    Autreto yield a grey-brown solid
15. 15
    AutreThe product was purified by precipitation of a chloroform solution into methanol
16. 16
    Filtrationfollowed by filtration (13.2 g, 53%)

Mode opératoire

In a 3-neck round bottom flask equipped with an argon inlet and an addition flannel, thieno[3,2-b]thiophene (7.5 g, 54 mmol) was dissolved in tetrahydrofuran (1 L). After the solution was cooled to −78° C. using an isopropanol/dry ice bath, t-BuLi (100 mL, 170 mmol) was transferred by cannula to the addition funnel. The organolithium reagent was then added dropwise. After completion of the addition, the mixture was stirred for 20 min at −78° C. then warmed up with an isopropanol bath at room temperature for 30 minutes during which a yellow precipitate formed. The solution was cooled back at −78° C., and after cannula transfer to the addition funnel, trimethyltin chloride (200 mL of 1 M solution in THF, 200 mmol) was added dropwise. During addition of trimethyltin chloride, the precipitate disappeared and the solution turned light brown. After warming to room temperature the solution was stirred for 30 minutes then was poured into ice-cold water. The aqueous phase was further extracted with hexane. The combined organic phase were washed with cold water then dried with magnesium sulfate. After filtration, the solvent is evaporated under vacuum to yield a grey-brown solid. The product was purified by precipitation of a chloroform solution into methanol followed by filtration (13.2 g, 53%).

Source