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

HRID 1270687ノート

反応式

HRID 1270687 の反応式
[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

参加物

4

反応物 1

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

生成物 1

HCID 44218643,4-Ethylenedioxythiophene収率 98.9%

試薬・触媒・溶媒 2

HCID 23978Copper触媒HCID 174Ethylene Glycol溶媒

実験手順

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%).

後処理

  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

出典と根拠

ORDレコード
ord-5434fbfa565d460d8375d7dc18e5f548
出典データセット
uspto-grants-2007_04
特許番号
US07202369B2

反応ノート

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