Triethylamine → 4,6-Dichloro-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic Acid Ethyl Ester

HRID 901256ノート

反応式

HRID 901256 の反応式
[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:27])[N:8]([CH2:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[CH:21][CH:20]=2)[C:9]2[C:14]([C:15]=1O)=[CH:13][C:12]([Cl:17])=[CH:11][N:10]=2)=[O:5])[CH3:2].C(N(CC)CC)C.O=P(Cl)(Cl)[Cl:37]>>[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:27])[N:8]([CH2:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[CH:21][CH:20]=2)[C:9]2[C:14]([C:15]=1[Cl:37])=[CH:13][C:12]([Cl:17])=[CH:11][N:10]=2)=[O:5])[CH3:2]

参加物

4

反応物 3

HCID 8471TriethylamineHCID 24813Phosphorus oxychlorideHCID 547385986-Chloro-4-hydroxy-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic Acid Ethyl Ester

生成物 1

HCID 692156984,6-Dichloro-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic Acid Ethyl Ester収率 85%

実験手順

A solution of 6-chloro-4-hydroxy-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic acid ethyl ester (75) (6.0 g, 15.43 mmol) and triethylamine (5.36 mL, 38.57 mmol) was heated in neat POCl3 at 90° C. for 3 h. The solution was cooled and the excess POCl3 was distilled under vacuum. The residue was suspended in saturated NaHCO3 solution, sonicated briefly and filtered. The solids were dissolved in dichloromethane, washed subsequently by saturated NaHCO3 solution, water and brine. The organic phase was dried over MgSO4 and evaporated to yield 6.2 g (85%) of 4,6-dichloro-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-[1,8]-naphthyridine-3-carboxylic acid ethyl ester (77) as yellow waxy solids. 1H-NMR (DMSO-d6): δ 1.30 (t, J=7.2 Hz, 3H), 3.69 (s, 3H), 4.38 (q, J=7.2 Hz, 2H), 5.50 (s, 2H), 6.82 (m, 2H), 7.24 (m, 2H), 8.48 (d, J=2.4 Hz, 1H), 8.87 (d, J=2.4 Hz, 1H); EIMS: 407 (M).

後処理

  1. temperatureThe solution was cooled
  2. distillationthe excess POCl3 was distilled under vacuum
  3. customsonicated briefly
  4. filtrationfiltered
  5. dissolutionThe solids were dissolved in dichloromethane
  6. washwashed subsequently by saturated NaHCO3 solution, water and brine
  7. dry with materialThe organic phase was dried over MgSO4
  8. customevaporated

出典と根拠

ORDレコード
ord-df795b11e3054887aafd25da1d08304f
出典データセット
uspto-grants-2008_04
特許番号
US07361760B2

反応ノート

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