2-Chloroacrylonitrile → 1-tert-Butyl-1H-pyrazol-5-amine

HRID 605596ノート

反応式

HRID 605596 の反応式
Cl.[C:2]([NH:6][NH2:7])([CH3:5])([CH3:4])[CH3:3].C([O-])(=O)C.[Na+].Cl[C:14](=[CH2:17])[C:15]#[N:16]>C(O)C>[C:2]([N:6]1[C:15]([NH2:16])=[CH:14][CH:17]=[N:7]1)([CH3:5])([CH3:4])[CH3:3]

参加物

5

反応物 3

HCID 701982-ChloroacrylonitrileHCID 81889tert-Butylhydrazine monohydrochlorideHCID 517045Sodium Acetate

生成物 1

HCID 398690981-tert-Butyl-1H-pyrazol-5-amine

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

反応条件

温度
80 °C

実験手順

To 600 ml of ethanol were successively added 59.94 g of tert-butylhydrazine hydrochloride, 79.3 g of sodium acetate and 50 ml of 2-chloroacrylonitrile at room temperature, followed by stirring the reaction mixture at 80° C. for 12 hours. After removing the solvent in vacuo, water was added to the residue. The mixture was neutralized with sodium hydrogen carbonate, and extracted with ethyl acetate. The obtained ethyl acetate solution was washed with brine, dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated in vacuo. The obtained residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=2/1-1/2) to give the title compound as a pale yellow oil.

後処理

  1. customat room temperature
  2. customAfter removing the solvent in vacuo, water
  3. additionwas added to the residue
  4. extractionextracted with ethyl acetate
  5. washThe obtained ethyl acetate solution was washed with brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated in vacuo
  9. customThe obtained residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=2/1-1/2)

出典と根拠

ORDレコード
ord-f8fbf19698334d699d5091498afb78e9
出典データセット
uspto-grants-2011_03
特許番号
US07915263B2

反応ノート

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