ChemicalBook CAS DataBase List 3,3'''-dioctyl-2,2':5',5'':2'',2'''-quaterthiophene

3,3'''-dioctyl-2,2':5',5'':2'',2'''-quaterthiophene synthesis

7synthesis methods

Product Name:3,3'''-dioctyl-2,2':5',5'':2'',2'''-quaterthiophene
CAS Number:153938-82-0
Molecular formula:C32H42S4
Molecular Weight:554.94

4805-22-5
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145543-83-5
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3,3'''-dioctyl-2,2':5',5'':2'',2'''-quaterthiophene

153938-82-0
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Yield:153938-82-0 71%

Reaction Conditions:

Stage #1: 2-bromo-3-octylthiophenewith magnesium;ethylene dibromide in diethyl ether; for 3 h;Inert atmosphere;Reflux;
Stage #2: 5,5'-dibromo-2,2'-bisthiophene in diethyl ether;Reflux;Inert atmosphere;

Steps:

1.4 4) Synthesis of intermediate compound 4

500mL three-necked flask was added magnesium tablets (10g) and 100mL ether under argon was added dropwise 2_ bromo-3-octylthiophene (35g) and 1,2-dibromoethane (5.65g) in 50mL of ether After the addition, reflux for three hours. After the reaction was completed, the reaction solution was added dropwise to the solution2,5-dibromo-bithiophene(15.87 g), Ni (dppp) 2 Cl2 (1.59 g) and 100 mL of diethyl etherThree bottles, after adding, reflux overnight. After completion of the reaction, dilute hydrochloric acid was added and the mixture was extracted with dichloromethane, dried over anhydrous sodium sulfate,The organic solvent was removed and the column was separated to give a light yellow liquid, Intermediate 4 (19.22 g, 71% yield).

References:

CN104774200,2018,B Location in patent:Paragraph 0136-0137

145543-83-5
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171290-94-1 Synthesis