Hydroxyamine hydrochloride → 4-Hexylthiophene-2-carbonitrile

HRID 1185976ノート

反応式

HRID 1185976 の反応式
[CH2:1]([C:7]1[CH:8]=[C:9]([CH:12]=O)[S:10][CH:11]=1)[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6].Cl.[NH2:15]O>N1C=CC=CC=1.C(O)C>[CH2:1]([C:7]1[CH:8]=[C:9]([C:12]#[N:15])[S:10][CH:11]=1)[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6]

参加物

4

反応物 2

HCID 443297Hydroxyamine hydrochlorideHCID 584209364-Hexylthiophene-2-carbaldehyde

生成物 1

HCID 584209064-Hexylthiophene-2-carbonitrile収率 84.5%

試薬・触媒・溶媒 1

HCID 21975839Pyridine ethanol溶媒

実験手順

A mixture solution of 4-hexylthiophene-2-carbaldehyde (11.8 g, 60.0 mmol) and hydroxylamine hydrochloride salt (6.3 g, 90 mmol) in pyridine/ethanol (60 mL, 1/1 v/v) was stirred at 80° C. overnight. Then the solvent was removed and the residue was dissolved in chloroform (100 mL). The solution was washed with distilled water (2×50 mL) and dried over anhydrous magnesium sulphate. The solvent was removed and the viscous liquid residue was refluxed in acetic anhydride (30 mL) containing potassium acetate (0.2 g) for 3 h. Then the mixture was poured into distilled water (100 mL) and extracted with hexanes (3×50 mL). The combined organic phase was washed three times with water (50 mL), dried over anhydrous magnesium sulfate before the solvent was removed by rotary evaporation. The yellow liquid residue was purified by silica-gel column chromatography (EtOAc/hexane=7/93, v/v, Rf=0.4) to yield a clear light yellow liquid product. (9.8 g, 84.5% yield). 1H NMR (400 MHz, CDCl3) δ (ppm): 7.43 (d, 1H, J=1.4 Hz); 7.17 (d, 1H, J=1.4 Hz); 2.60 (t, 2H, J=8.0 Hz); 1.59 (m, 2H); 1.22-1.36 (m, 6H); 0.87 (m, 3H). 13C NMR (100 MHz, CDCl3): δ 144.04, 138.22, 127.41, 114.48, 109.28, 31.45, 30.18, 29.86, 28.67, 22.46, 13.96. HRMS EI calcd for C11H15S 193.0925, found 193.0915.

後処理

  1. customThen the solvent was removed
  2. dissolutionthe residue was dissolved in chloroform (100 mL)
  3. washThe solution was washed with distilled water (2×50 mL)
  4. dry with materialdried over anhydrous magnesium sulphate
  5. customThe solvent was removed
  6. temperaturethe viscous liquid residue was refluxed in acetic anhydride (30 mL)
  7. additioncontaining potassium acetate (0.2 g) for 3 h
  8. additionThen the mixture was poured
  9. distillationinto distilled water (100 mL)
  10. extractionextracted with hexanes (3×50 mL)
  11. washThe combined organic phase was washed three times with water (50 mL)
  12. dry with materialdried over anhydrous magnesium sulfate before the solvent
  13. customwas removed by rotary evaporation
  14. customThe yellow liquid residue was purified by silica-gel column chromatography (EtOAc/hexane=7/93, v/v, Rf=0.4)
  15. customto yield a clear light yellow liquid product

出典と根拠

ORDレコード
ord-7205a3770dcc4e36bd851ac41d8cbcc3
出典データセット
uspto-grants-2014_03
特許番号
US08673183B2

反応ノート

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