Sodium Hydroxide → 1-Methyl-1H-pyrazole-4-carboxylic acid

HRID 356448

反応式

HRID 356448 の反応式
[CH3:1][N:2]1[CH:6]=[C:5]([C:7]([O:9]CC)=[O:8])[CH:4]=[N:3]1.[OH-].[Na+]>C(O)C>[CH3:1][N:2]1[CH:6]=[C:5]([C:7]([OH:9])=[O:8])[CH:4]=[N:3]1

参加物

4

反応物 2

HCID 14798Sodium HydroxideHCID 11116265ethyl 1-methyl-1H-pyrazole-4-carboxylate

生成物 1

HCID 6431601-Methyl-1H-pyrazole-4-carboxylic acid収率 86%

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

実験手順

A solution of ethyl 1-methyl-1H-pyrazole-4-carboxylate (20.2 g, 131 mmol) and NaOH (6.3 g, 158 mmol) in 200 mL absolute ethanol was refluxed for 2 h and stirring was continued at RT for 18 h. After that, the solvent was removed in vacuo. The residue was dissolved in water. The aq solution was washed with ether and acidified with concentrated HCl. The solid was filtered, washed with water and air-dried to give 14.2 g of 1-methyl-1H-pyrazole-4-carboxylic acid in 86% yield.

後処理

  1. customAfter that, the solvent was removed in vacuo
  2. dissolutionThe residue was dissolved in water
  3. washThe aq solution was washed with ether
  4. filtrationThe solid was filtered
  5. washwashed with water
  6. customair-dried

出典と根拠

ORDレコード
ord-be92d302f9ea4966943f485ff6aaf2a7
出典データセット
uspto-grants-1998_11
特許番号
US05834447

関連ノート

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