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

HRID 14298

반응식

HRID 14298 반응식
[O:1]1[CH:5]=[CH:4][N:3]=[CH:2]1.C([Li])CCC.[CH2:11]([N:15]([CH3:29])[C:16]([C:18]1[CH:19]=[C:20]([CH:25]=[C:26](I)[CH:27]=1)[C:21]([O:23][CH3:24])=[O:22])=[O:17])[CH2:12][CH2:13][CH3:14]>O1CCCC1.C(OCC)(=O)C.[Cl-].[Zn+2].[Cl-]>[CH2:11]([N:15]([CH3:29])[C:16]([C:18]1[CH:19]=[C:20]([CH:25]=[C:26]([C:2]2[O:1][CH:5]=[CH:4][N:3]=2)[CH:27]=1)[C:21]([O:23][CH3:24])=[O:22])=[O:17])[CH2:12][CH2:13][CH3:14]

참가 물질

7

반응물 3

HCID 9255OxazoleHCID 21086165Methyl 3-{[butyl(methyl)amino]carbonyl)-5-iodobenzoateHCID 178418339Butyllithium

생성물 1

HCID 21086164Methyl 3-{[butyl(methyl)amino]carbonyl}-5-(1,3-oxazol-2-yl)benzoate

시약·촉매·용매 3

HCID 3007855Zincchloride촉매HCID 8028Tetrahydrofuran용매2회HCID 8857Ethyl Acetate용매

반응 조건

온도
0 °C

실험 절차

To a −70° C. stirred solution of oxazole (167 mg, 2.4 mmol) in tetrahydrofuran (4 mL) is added n-butyllithium (1.6 M in hexanes, 1.7 mL, 2.7 mmol). After 30 min, zinc chloride (1 M in diethyl ether, 7.3 mL, 7.3 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-{[butyl(methyl)amino]carbonyl}-5-iodobenzoate (864 mg, 2.3 mmol) in anhydrous tetrahydrofuran (3 mL) followed by palladium(0)tetrakis(triphenylphosphine) (112 mg, 0.10 mmol). The reaction mixture is heated at reflux for 1.5 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]+.

후처리

  1. temperatureThe reaction mixture is heated
  2. temperatureat reflux for 1.5 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)

출처 및 근거

ORD 기록
ord-f3b88abfac8942b69e60e949fb4b0ad9
출처 데이터셋
uspto-grants-2010_06
특허 번호
US07727997B2

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