Oxazole → Methyl 3-{[ethyl(propyl)amino]carbonyl}-5-(1,3-oxazol-2-yl)benzoate

HRID 14302

反応式

HRID 14302 の反応式
[O:1]1[CH:5]=[CH:4][N:3]=[CH:2]1.C([Li])CCC.[CH2:11]([N:13]([CH2:27][CH2:28][CH3:29])[C:14]([C:16]1[CH:17]=[C:18]([CH:23]=[C:24](I)[CH:25]=1)[C:19]([O:21][CH3:22])=[O:20])=[O:15])[CH3:12]>O1CCCC1.C(OCC)(=O)C.[Cl-].[Zn+2].[Cl-]>[CH2:11]([N:13]([CH2:27][CH2:28][CH3:29])[C:14]([C:16]1[CH:17]=[C:18]([CH:23]=[C:24]([C:2]2[O:1][CH:5]=[CH:4][N:3]=2)[CH:25]=1)[C:19]([O:21][CH3:22])=[O:20])=[O:15])[CH3:12]

参加物

7

反応物 3

HCID 9255OxazoleHCID 21086183Methyl 3-{[ethyl(propyl)amino]carbonyl}-5-iodobenzoateHCID 178418339Butyllithium

生成物 1

HCID 21086182Methyl 3-{[ethyl(propyl)amino]carbonyl}-5-(1,3-oxazol-2-yl)benzoate

試薬・触媒・溶媒 3

HCID 3007855Zincchloride触媒HCID 8028Tetrahydrofuran溶媒2 回HCID 8857Ethyl Acetate溶媒

反応条件

温度
0 °C

実験手順

To a −70° C. stirred solution of oxazole (106 mg, 1.5 mmol) in tetrahydrofuran (4 mL) is added n-butyllithium (1.6 M in hexanes, 1.0 mL, 1.7 mmol). After 30 min, zinc chloride (1 M in diethyl ether, 4.6 mL, 4.6 mmol) is added and the reaction mixture is warmed to 0° C. for 1 h. To this mixture is added a solution of methyl 3-{[ethyl(propyl)amino]carbonyl}-5-iodobenzoate (535 mg, 1.45 mmol) in anhydrous tetrahydrofuran (1.8 mL) followed by palladium(0)tetrakis(triphenylphosphine) (120 mg, 0.10 mmol). The reaction mixture is heated at reflux for 2 h. The reaction mixture is cooled, diluted with ethyl acetate, washed with water, and saturated sodium chloride, dried (sodium sulfate), filtered, and concentrated under reduced pressure. Purification by flash column chromatography (silica gel, 60% ethyl acetate/hexane) provides the title compound. ESI MS m/z 317.1 [M+H]+.

後処理

  1. temperatureThe reaction mixture is heated
  2. temperatureat reflux for 2 h
  3. temperatureThe reaction mixture is cooled
  4. washwashed with water, and saturated sodium chloride
  5. dry with materialdried (sodium sulfate)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customPurification by flash column chromatography (silica gel, 60% ethyl acetate/hexane)

出典と根拠

ORDレコード
ord-99f179976a1448d08a0d2b74a72f991c
出典データセット
uspto-grants-2010_06
特許番号
US07727997B2

関連ノート

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