تفاعل #3786

معادلة التفاعل

1,2-bis(5-bromo-2-methyl-3-thienyl)hexafluorocyclopentene

5-(5-trimethylsilyl-2-thienyl)-2-thienyl boric acid

potassium carbonate

→

hexafluorocyclopentene

المردود 35.0%

المذيبات

dimethoxyethane

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthe reaction mixture was refluxed for two hours
2. 2
   تركيزIt was then concentrated under reduced pressures
3. 3
   استخلاصextracted with diethylether
4. 4
   غسيلrinsed with water
5. 5
   أخرىWith the diethylether removed under reduced pressures
6. 6
   أخرىthe product was purified by alumina column chromatogram

الإجراء التجريبي

1,2-bis(5-bromo-2-methyl-3-thienyl)hexafluorocyclopentene (1.0 g, 0.002 mol) was dissolved in dimethoxyethane (50 ml), and palladium tetra(triphenylphosphine) (120 mg) was added to the mixture which was stirred for 5 minutes under argon atmosphere. With 5-(5-trimethylsilyl-2-thienyl)-2-thienyl boric acid (1.4 g, 0.006 mol) and an aqueous solution of potassium carbonate (0.1 mol dm-3, 10 ml) were added, the reaction mixture was refluxed for two hours. It was then concentrated under reduced pressures, extracted with diethylether and rinsed with water. With the diethylether removed under reduced pressures, the product was purified by alumina column chromatogram to give 1,2-bis[2-methyl-5{5-trimethylsilyl-2-thienyl)-2-thienyl}-3-thienyl]hexafluorocyclopentene (550 mg, 0.0007 mol).

المصدر