Ammonium Acetate → HCID 59587539、化合物

HRID 389699ノート

反応式

HRID 389699 の反応式
[F:1][C:2]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:3]=1[C:4]([O:6][CH:7]([C:18]([O:20][CH2:21][CH3:22])=[O:19])[C:8]([C:10]1[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[CH:12][CH:11]=1)=O)=O.C([O-])(=O)C.[NH4+:32]>C(O)(=O)C.O>[F:1][C:2]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:3]=1[C:4]1[O:6][C:7]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[C:8]([C:10]2[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[CH:12][CH:11]=2)[N:32]=1

参加物

5

反応物 2

HCID 517165Ammonium Acetate2 回HCID 59587379HCID 59587379、化合物

生成物 1

HCID 59587539HCID 59587539、化合物収率 53%

試薬・触媒・溶媒 2

HCID 176Acetic Acid溶媒HCID 962Water溶媒

実験手順

To a stirred solution of 3-ethoxy-1-(4-methoxyphenyl)-1,3-dioxopropan-2-yl 2,6-difluorobenzoate (0.082 g, 0.22 mmol) in acetic acid (3 mL) was added ammonium acetate (0.125 g, 1.62 mmol) and the reaction mixture heated to reflux for 3 hours. A further portion of ammonium acetate (0.017 g, 0.22 mmol) was added the reaction mixture heated to reflux for 1 hour. The reaction was diluted with water and extracted with EtOAc. The organic phase was washed with water and brine, dried over MgSO4 and the solvent removed in vacuo. The residue was purified by silica gel column chromatography using 15% EtOAc in hexanes as eluent to afford ethyl 2-(2,6-difluorophenyl)-4-(4-methoxyphenyl)oxazole-5-carboxylate (0.041 g, 0.11 mmol, 53%) as a white crystalline solid. 1H NMR (CDCl3) δ 1.41 (3H, t), 3.87 (3H, s), 4.43 (2H, q), 6.99 (2H, d), 7.07 (2H, t), 7.49 (1H, m), 8.15 (2H, d). LCMS (1) Rt: 2.46 min; m/z (ES+) 360.

後処理

  1. temperaturethe reaction mixture heated
  2. temperatureto reflux for 3 hours
  3. temperatureheated
  4. temperatureto reflux for 1 hour
  5. extractionextracted with EtOAc
  6. washThe organic phase was washed with water and brine
  7. dry with materialdried over MgSO4
  8. customthe solvent removed in vacuo
  9. customThe residue was purified by silica gel column chromatography

出典と根拠

ORDレコード
ord-13e3019fa2ac46cb868d663063a40f58
出典データセット
uspto-grants-2013_02
特許番号
US08378095B2

反応ノート

読み込み中…