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Cesium carbonate → 2-Chloro-6-fluoro-3-methylimidazo[1,2-A]pyridine

HRID 705073
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HRID 705073 반응식
[Cl:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][C:7]([F:10])=[CH:6][N:5]2[C:11]=1I.[CH3:13]B(O)O.C(=O)([O-])[O-].[Cs+].[Cs+].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[Cl:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][C:7]([F:10])=[CH:6][N:5]2[C:11]=1[CH3:13]
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참가 물질

7

반응물 4

HCID 10796Cesium carbonateHCID 11776TriphenylphosphineHCID 139377Methylboronic AcidHCID 717433442-Chloro-6-fluoro-3-iodoimidazo[1,2-A]pyridine

생성물 1

HCID 717433452-Chloro-6-fluoro-3-methylimidazo[1,2-A]pyridine

시약·촉매·용매 2

HCID 167845palladium(II) acetate
촉매
HCID 8028Tetrahydrofuran용매

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온도
100 °C

실험 절차

A mixture of the title compound from Example 3 Step A (0.500 g, 1.69 mmol), palladium acetate (0.038 g, 0.169 mmol), methyl boronic acid (0.202 g, 3.37 mmol), cesium carbonate (1.65 g, 5.06 mmol) and triphenyl phosphine (0.088 g, 0.337 mmol) in tetrahydrofuran (8.43 mL) was heated in a sealed tube at 100° C. for 18 hours. The mixture was then cooled to room temperature, filtered, and concentrated under reduced pressure. Purification by flash chromatography on silica gel (0-20% ethyl acetate in hexanes) provided the title compound: LCMS m/z 184.9 [M+H]+ 186.86 [M+2+H]+; 1H NMR (500 MHz, CDCl3) δ 7.75 (d, J=2.4 Hz, 1H), 7.51 (dd, J=9.7, 4.9 Hz, 1H), 7.14-7.102 (m, 1H), 2.44 (s, 3H).

후처리

  1. temperatureThe mixture was then cooled to room temperature
  2. filtrationfiltered
  3. concentrationconcentrated under reduced pressure
  4. customPurification by flash chromatography on silica gel (0-20% ethyl acetate in hexanes)

출처 및 근거

ORD 기록
ord-bc47f146f1a4447899c5ab126c127a0a
출처 데이터셋
uspto-grants-2015_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09173873B2

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