N,N-Dimethylaniline → 1H-naphth(2,1-b)(1,4)oxazin-2(3H)-one

HRID 1439857

反応式

HRID 1439857 の反応式
[NH2:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[CH:4][C:3]=1[OH:12].CN(C)C1C=CC=CC=1.[O:22]1CC[CH2:24][CH2:23]1.ClCC(Cl)=O>C(OCC)(=O)C>[NH:1]1[C:23](=[O:22])[CH2:24][O:12][C:3]2[CH:4]=[CH:5][C:6]3[C:11]([C:2]1=2)=[CH:10][CH:9]=[CH:8][CH:7]=3

参加物

6

反応物 4

HCID 949N,N-DimethylanilineHCID 6577Chloroacetyl chlorideHCID 8028TetrahydrofuranHCID 145351-Amino-2-naphthol

生成物 1

HCID 846651H-naphth(2,1-b)(1,4)oxazin-2(3H)-one

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒

実験手順

To a mixture of 1-amino-2-naphthol (16.9 g), N,N-dimethylaniline (19.3 g) and tetrahydrofuran (200 ml) is added dropwise chloroacetyl chloride under ice cooling, and the mixture is stirred at the same temperature for one hour. To the reaction mixture is added ethyl acetate, and the ethyl acetate layer is washed, dried and distilled to remove the solvent. The resulting oil is dissolved in acetone (500 ml) and thereto is added potassium carbonate (75 g), and the mixture is refluxed for 2 hours, and acetone is distilled off. To the residue is added water, and the precipitate is separated by filtration, washed, dried and recrystallized from tetrahyrofuran to give 1H-naphtho[2,1-b][1,4]oxazin-2(3H)-one (13.1 g). M.p. 219°-220.5° C.

後処理

  1. washthe ethyl acetate layer is washed
  2. customdried
  3. distillationdistilled
  4. customto remove the solvent
  5. dissolutionThe resulting oil is dissolved in acetone (500 ml)
  6. additionis added potassium carbonate (75 g)
  7. temperaturethe mixture is refluxed for 2 hours
  8. distillationacetone is distilled off
  9. additionTo the residue is added water
  10. customthe precipitate is separated by filtration
  11. washwashed
  12. customdried
  13. customrecrystallized from tetrahyrofuran

出典と根拠

ORDレコード
ord-612c7cbaea9e4c7b8d1d681e848412e0
出典データセット
uspto-grants-1996_03
特許番号
US05496815

関連ノート

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