Triethylamine → Tert-butyl 4-(N-hydroxycarbamimidoyl)-phenylcarbamate

HRID 56624

反応式

HRID 56624 の反応式
[Cl-].[OH:2][NH3+:3].C(N(CC)CC)C.[C:11]([O:15][C:16](=[O:26])[NH:17][C:18]1[CH:23]=[CH:22][C:21]([C:24]#[N:25])=[CH:20][CH:19]=1)([CH3:14])([CH3:13])[CH3:12]>C(O)C>[OH:2][N:3]=[C:24]([C:21]1[CH:20]=[CH:19][C:18]([NH:17][C:16](=[O:26])[O:15][C:11]([CH3:13])([CH3:12])[CH3:14])=[CH:23][CH:22]=1)[NH2:25]

参加物

5

反応物 3

HCID 8471TriethylamineHCID 21645Hydroxylamine HClHCID 10130644Tert-butyl 4-cyanophenylcarbamate

生成物 1

HCID 53439229Tert-butyl 4-(N-hydroxycarbamimidoyl)-phenylcarbamate

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

実験手順

At RT, 1.40 g (20.16 mmol, 2.2 eq.) of hydroxylammonium chloride and 2.81 ml (20.16 mmol, 2.2 eq.) of triethylamine were added to a solution of 2.0 g (9.16 mmol) of tert-butyl-(4-cyanophenyl)carbamate in 45 ml of ethanol. The reaction mixture was heated under reflux for 4 h and concentrated under reduced pressure. The residue was stirred with 100 ml of water at RT for 1 h. The reaction mixture was filtered and the filter cake was washed with water. The residue was dissolved in ethyl acetate. The aqueous phase that remained was separated off and the organic phase was dried (sodium sulphate), filtered and concentrated under reduced pressure. The crude product was used for the next step without purification. Yield: 2.10 g (purity 95%, 87% of theory)

後処理

  1. temperatureThe reaction mixture was heated
  2. temperatureunder reflux for 4 h
  3. concentrationconcentrated under reduced pressure
  4. filtrationThe reaction mixture was filtered
  5. washthe filter cake was washed with water
  6. dissolutionThe residue was dissolved in ethyl acetate
  7. customThe aqueous phase that remained was separated off
  8. dry with materialthe organic phase was dried (sodium sulphate)
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure
  11. customThe crude product was used for the next step without purification

出典と根拠

ORDレコード
ord-2f4bc81327554caa957bda3a2531d281
出典データセット
uspto-grants-2016_09
特許番号
US09434690B2

関連ノート

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