Methanol → 1,2-Diphenyl-3,5-pyrazolidinedione

HRID 1634001

反応式

HRID 1634001 の反応式
[C:1]([O:9]CC)(=O)[CH2:2][C:3]([O:5]CC)=O.[C:12]1([NH:18][NH:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.CO.C[O-].[Na+]>C(O)CCC>[C:20]1([N:19]2[C:1](=[O:9])[CH2:2][C:3](=[O:5])[N:18]2[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

参加物

6

反応物 4

HCID 887MethanolHCID 7761Diethyl MalonateHCID 31222HydrazobenzeneHCID 10942334Sodium Methoxide

生成物 1

HCID 175611,2-Diphenyl-3,5-pyrazolidinedione収率 68.7%

試薬・触媒・溶媒 1

HCID 2631-Butanol溶媒

反応条件

温度
100 °C

実験手順

Three point six five (3.65) grams (22.8 mmol) of diethyl malonate and 4.00 g (21.7 mmol) of 1,2-diphenylhydrazine were dissolved in 10 ml of n-butanol, then 4.61 g (23.9 mmol) of a 28% methanol solution of sodium methoxide was added thereto, and the reaction system was heated at 100° C. for 10 hours. Subsequently the solvent was distilled off under reduced pressure, 10 ml of water was added thereto and stirred, and then the reaction solution was filtered. An activated carbon was added to the recovered filtrate and stirred for 30 minutes. After stirring, the solution was filtered again to recover the filtrate. Four (4) ml of hydrochloric acid was added to the filtrate, and the precipitated solid was recovered by filtration. Thus, 3.76 g (yield: 60%) of 1,2-diphenyl-3,5-pyrazolidinedione was obtained.

後処理

  1. distillationSubsequently the solvent was distilled off under reduced pressure, 10 ml of water
  2. additionwas added
  3. filtrationthe reaction solution was filtered
  4. additionAn activated carbon was added to the recovered filtrate
  5. stirringstirred for 30 minutes
  6. stirringAfter stirring
  7. filtrationthe solution was filtered again
  8. customto recover the filtrate
  9. additionFour (4) ml of hydrochloric acid was added to the filtrate
  10. filtrationthe precipitated solid was recovered by filtration

出典と根拠

ORDレコード
ord-85dba744142a49b1a8696df351e74ca4
出典データセット
uspto-grants-2003_01
特許番号
US06506507B1

関連ノート

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