Cinchomeronic acid → 1H,3H-furo(3,4-c)pyridine-1,3-dione

HRID 1451471

反応式

HRID 1451471 の反応式
[N:1]1[CH:6]=[CH:5][C:4]([C:7]([OH:9])=O)=[C:3]([C:10]([OH:12])=[O:11])[CH:2]=1>C(OC(=O)C)(=O)C>[N:1]1[CH:6]=[CH:5][C:4]2[C:7]([O:12][C:10](=[O:11])[C:3]=2[CH:2]=1)=[O:9]

参加物

3

反応物 1

HCID 10273Cinchomeronic acid

生成物 1

HCID 2783981H,3H-furo(3,4-c)pyridine-1,3-dione収率 75.5%

試薬・触媒・溶媒 1

HCID 7918Acetic Anhydride溶媒

実験手順

A mixture of pyridine 3,4-dicarboxylic acid (15.0 g) and acetic anhydride (30 mL) is refluxed for two hours. The excess acetic anhydride is removed by distillation and the anhydride is collected and purified by sublimation (123° C. at 3 mm Hg) to yield pyridine 3,4-dicarboxylic acid anhydride as a white solid (10.1 g).

後処理

  1. temperatureis refluxed for two hours
  2. customThe excess acetic anhydride is removed by distillation
  3. customthe anhydride is collected
  4. custompurified by sublimation (123° C. at 3 mm Hg)

出典と根拠

ORDレコード
ord-26848a4e1a04400080d48a23d17b4fcf
出典データセット
uspto-grants-1997_02
特許番号
US05604246

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