Acetic Anhydride → 1-(5-Bromo-4-fluoroindazol-1-yl)ethanone

HRID 2400942노트

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HRID 2400942 반응식
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9](=[O:11])[CH3:10])=[C:4]([CH3:12])[C:3]=1[F:13].C(OC(=O)C)(=O)C.C([O-])(=O)C.[K+].C1OCCOCCOCCOCCOCCOC1.[N:44](OCCC(C)C)=O>ClCCCl>[Br:1][C:2]1[C:3]([F:13])=[C:4]2[C:5](=[CH:6][CH:7]=1)[N:8]([C:9](=[O:11])[CH3:10])[N:44]=[CH:12]2

참가 물질

7

반응물 5

HCID 7918Acetic AnhydrideHCID 8053Isoamyl NitriteHCID 2855718-Crown-6HCID 517044Potassium AcetateHCID 67123438N-(4-Bromo-3-fluoro-2-methylphenyl)acetamide

생성물 1

HCID 671234961-(5-Bromo-4-fluoroindazol-1-yl)ethanone

시약·촉매·용매 1

HCID 111,2-Dichloroethane용매

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온도
65 °C

실험 절차

N-(4-Bromo-3-fluoro-2-methylphenyl)acetamide (36 mmol) was suspended in 1,2 dichloroethane (150 mL) and acetic anhydride (108 mmol), potassium acetate (74 mmol), 18-Crown-6 (1.4 mmol) and isopentyl nitrite (79 mmol) were added sequentially. The mixture was heated at 65° C. for 24 h, cooled to rt and washed with sat. NaHCO3. The organic layer was dried (Na2SO4) and concentrated and the residue was purified by flash chromatography (0-20% EtOAc/hexanes). 1-(5-Bromo-4-fluoroindazol-1-yl)ethanone was obtained as a brown solid.

후처리

  1. temperaturecooled to rt
  2. washwashed with sat. NaHCO3
  3. dry with materialThe organic layer was dried (Na2SO4)
  4. concentrationconcentrated
  5. customthe residue was purified by flash chromatography (0-20% EtOAc/hexanes)

출처 및 근거

ORD 기록
ord-8abd23e0bbd14ffaa927ae166b7db053
출처 데이터셋
uspto-grants-2014_08
특허 번호
US08796256B2

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