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

HRID 1270687

Reaktionsgleichung

Reaktionsgleichung von HRID 1270687
[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>[Cu].C(O)CO>[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 98,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23978CopperKatalysatorHCID 174Ethylene GlycolLösungsmittel

Versuchsvorschrift

3,4-Ethylenedioxy-2,5-thiophenedicarboxylic acid (460 g) and a copper powder (69 g) were added to ethylene glycol (1400 g) at room temperature. The reaction mixture was stirred under air for 30 minutes at room temperature, and air was continuously introduced into the reaction mixture. The reaction mixture was then heated at 140° C. for 8 hours. After the reaction was complete, the reaction mixture was purified using the same process as described in Example 1 to obtain 3,4-ethylenedioxythiophene (281 g, purity: 98%).

Aufarbeitung

  1. additionair was continuously introduced into the reaction mixture
  2. temperatureThe reaction mixture was then heated at 140° C. for 8 hours
  3. customthe reaction mixture was purified

Quellen und Nachweise

ORD-Eintrag
ord-5434fbfa565d460d8375d7dc18e5f548
Quelldatensatz
uspto-grants-2007_04
Patentnummer
US07202369B2

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