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Potassium Carbonate → Tetraisopropyl (2-(5-(3,5-dimethylisoxazol-4-yl)pyridin-3-yl)-1-fluoroethane-1,1-diyl)bis(phosphonate)

HRID 2410257
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HRID 2410257 반응식
Br[C:2]1[CH:3]=[C:4]([CH2:8][C:9]([P:21](=[O:30])([O:26][CH:27]([CH3:29])[CH3:28])[O:22][CH:23]([CH3:25])[CH3:24])([P:11](=[O:20])([O:16][CH:17]([CH3:19])[CH3:18])[O:12][CH:13]([CH3:15])[CH3:14])[F:10])[CH:5]=[N:6][CH:7]=1.[CH3:31][C:32]1[C:36](B(O)O)=[C:35]([CH3:40])[O:34][N:33]=1.C(=O)([O-])[O-].[K+].[K+]>COCCOC>[CH3:31][C:32]1[C:36]([C:2]2[CH:3]=[C:4]([CH2:8][C:9]([P:21](=[O:30])([O:22][CH:23]([CH3:24])[CH3:25])[O:26][CH:27]([CH3:29])[CH3:28])([P:11](=[O:20])([O:16][CH:17]([CH3:18])[CH3:19])[O:12][CH:13]([CH3:15])[CH3:14])[F:10])[CH:5]=[N:6][CH:7]=2)=[C:35]([CH3:40])[O:34][N:33]=1
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참가 물질

5

반응물 3

HCID 11430Potassium CarbonateHCID 27343463,5-Dimethylisoxazole-4-boronic acidHCID 86691496Tetraisopropyl(2-(5-bromopyridin-3-yl)-1-fluoroethane-1,1-diyl)bis(phosphonate)

생성물 1

HCID 86691497Tetraisopropyl (2-(5-(3,5-dimethylisoxazol-4-yl)pyridin-3-yl)-1-fluoroethane-1,1-diyl)bis(phosphonate)수율 47%

시약·촉매·용매 1

HCID 8071
1,2-Dimethoxyethane
용매

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온도
80 °C

실험 절차

A sample of tetraisopropyl (2-(5-bromopyridin-3-yl)-1-fluoroethane-1,1-diyl)bis(phosphonate) (85 mg; 0.16 mmol), Pd(Ph3)4 (36.9 mg; 0.032 mmol) and (3,5-dimethylisoxazol-4-yl)boronic acid (34 mg; 0.24 mmol) are added in a vial, the vial is capped with a septum and added DME (4 mL) is added. The mixture is immediately flushed with argon, potassium carbonate solution (2.5 eq.) is added and flushed again with argon. The reaction mixture is stirred at 80° C. for 36 h under argon. The mixture is cooled, diluted with EtOAc and filtered through Celite™, the Celite™ is rinsed 3× with EtOAc/MeOH (1:1). The combined filtrate is concentrated under vacuum and deposited on silica gel. Purification by column chromatography on silica gel (pre washed with 1% NEt3 in hexanes) using a solvent gradient from hexanes to EtOAc, and then to 50% MeOH in EtOAc lead to the isolation of the product as a brown oil (41 mg; 47% yield).

후처리

  1. customis capped with a septum
  2. additionis added
  3. additionis added
  4. customflushed again with argon
  5. temperatureThe mixture is cooled
  6. additiondiluted with EtOAc
  7. filtrationfiltered through Celite™
  8. washthe Celite™ is rinsed 3× with EtOAc/MeOH (1:1)
  9. concentrationThe combined filtrate is concentrated under vacuum
  10. customPurification by column chromatography on silica gel (pre washed with 1% NEt3 in hexanes)

출처 및 근거

ORD 기록
ord-31cf19ce63bd4e5e9d8c6a232515eb9b
출처 데이터셋
uspto-grants-2014_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08816082B2

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