Hydrochloric Acid → HCID 178498606、化合物

HRID 496559ノート

反応式

HRID 496559 の反応式
[Cl:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6]([OH:20])=[C:7]([C:16]([O:18][CH3:19])=[O:17])[C:8]([C:12]([O:14]C)=[O:13])=[N:9]2)=[CH:4][CH:3]=1.[OH-].[Na+].Cl>O>[C:16]([C:7]1[C:8]([C:12]([OH:14])=[O:13])=[N:9][C:10]2[C:5]([C:6]=1[OH:20])=[CH:4][CH:3]=[C:2]([Cl:1])[CH:11]=2)([O:18][CH3:19])=[O:17]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 178418477HCID 178418477、化合物

生成物 1

HCID 178498606HCID 178498606、化合物収率 94.5%

試薬・触媒・溶媒 1

HCID 962Water溶媒

反応条件

温度
60 °C

実験手順

To a stirred suspension of dimethyl 7-chloro-4-hydroxyquinoline-2,3-dicarboxylate (1.0 g, 3.38 mmol) in water (20 mL) was added an aqueous solution of sodium hydroxide (0.27 g, 6.75 mmol). Upon addition, the suspension dissolved. The reaction mixture was warmed to 60° C. for 1 hour. After this time the reaction was cooled to room temperature and acidified with concentrated hydrochloric acid. The product was then extracted into diethyl ether and ethyl acetate. The organic extracts were dried over MgSO4, filtered and concentrated in vacuo to provide the title compound as a solid (900 mg). This material was purified by recrystallization employing an ethyl acetate/hexane co-solvent system to provide the title compound (571 mg, 60%) as a white solid mp 296° C. (dec); MS (CI)=238 (M+H). Analysis for C12H8NO5Cl.0.45 CH3CO2CH2CH3.0.10 H2O: Calc'd: C, 51.30; H, 3.68; N, 4.34, Found: C, 51.28; H, 3.62; N, 3.97;1H NMR 8.22 (d, J=8.7 Hz, 1H), 7.92 (d, J=1.8 Hz, 1H), 7.28 (dd, J=8.7, 1.8 Hz, 1H), 3.90 (s, 3H).

後処理

  1. additionUpon addition
  2. dissolutionthe suspension dissolved
  3. temperatureAfter this time the reaction was cooled to room temperature
  4. extractionThe product was then extracted into diethyl ether and ethyl acetate
  5. dry with materialThe organic extracts were dried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-80292136ff344c8c94194082a712a03a
出典データセット
uspto-grants-2005_09
特許番号
US06946463B2

反応ノート

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