ChemicalBook CAS DataBase List Thieno[3,2-b]thiophene

Thieno[3,2-b]thiophene synthesis

11synthesis methods

Product Name:Thieno[3,2-b]thiophene
CAS Number:251-41-2
Molecular formula:C6H4S2
Molecular Weight:140.23

Thieno[3,2-b]thiophene can be used to prepare semiconductor polymers. After a solution of thiophene[3,2-b]-thiophene-2-carboxylic acid and copper in quinoline was stirred at 260°C for 30 minutes, the solution was cooled to room temperature and extracted with ether, and washed with 1M HCl(aq). The organic layer was dried and purified to give Thieno[3,2-b]thiophene.

930-96-1 Synthesis

930-96-1
237 suppliers
$11.00/1g

251-41-2
272 suppliers
$8.00/250mg

Yield:-

Steps:

Multi-step reaction with 3 steps
1: 81 percent / K₂CO₃ / dimethylformamide / 72 h / Ambient temperature
2: 90 percent / aq. LiOH / tetrahydrofuran / 3 h / Heating
3: 88 percent / Cu, quinoline / 0.5 h / 260 °C

References:

Fuller, Lance S.;Iddon, Brian;Smith, Kevin A. [Journal of the Chemical Society. Perkin transactions I,1997,# 22,p. 3465 - 3470]

1723-27-9 Synthesis