2,3-Dihydro-thieno(3,4-b)(1,4)dioxin-5,7-dicarboxylic acid → 3,4-Ethylenedioxythiophene

HRID 1270688

Reaktionsgleichung

Reaktionsgleichung von HRID 1270688
[CH2:1]1[CH2:9][O:8][C:7]2[C:3](=[C:4](C(O)=O)[S:5][C:6]=2C(O)=O)[O:2]1>C(=O)([O-])[O-].[Cu+2].CN(C=O)C>[CH2:1]1[CH2:9][O:8][C:7]2[C:3](=[CH:4][S:5][CH:6]=2)[O:2]1

Komponenten

4

Edukt 1

HCID 7288412,3-Dihydro-thieno(3,4-b)(1,4)dioxin-5,7-dicarboxylic acid

Produkt 1

HCID 44218643,4-EthylenedioxythiopheneAusbeute 95,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 14452Copper carbonateKatalysatorHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

3,4-Ethylenedioxythiophene-2,5-dicarboxylic acid (230 g) and basic copper carbonate (23 g) were added to DMF (600 g) at room temperature. While air was slowly introduced to the reaction mixture, it as heated at 120° C. for 5 hours. After cooling, the reaction mixture was purified using the same process as described in Example 1 to obtain 3,4-ethylenedioxythiophene (136 g, purity: 97%).

Aufarbeitung

  1. additionWhile air was slowly introduced to the reaction mixture, it
  2. temperatureAfter cooling
  3. customthe reaction mixture was purified

Quellen und Nachweise

ORD-Eintrag
ord-c0afad15774543e79cc67598afc32074
Quelldatensatz
uspto-grants-2007_04
Patentnummer
US07202369B2

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