Cesium carbonate → 4-Chloro-2-(difluoromethyl)-1-{[5-(3,5-difluorophenyl)-1,2,4-oxadiazol-3-yl]methyl}-1H-indole-5-carbonitrile

HRID 2101834Notes

Reaction equation

HRID 2101834 reaction equation
[Cl:1][C:2]1[C:10]([C:11]#[N:12])=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[C:5]([CH:13]([F:15])[F:14])[NH:6]2.C([O-])([O-])=O.[Cs+].[Cs+].Cl[CH2:23][C:24]1[N:28]=[C:27]([C:29]2[CH:34]=[C:33]([F:35])[CH:32]=[C:31]([F:36])[CH:30]=2)[O:26][N:25]=1>CC#N>[Cl:1][C:2]1[C:10]([C:11]#[N:12])=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[C:5]([CH:13]([F:14])[F:15])[N:6]2[CH2:23][C:24]1[N:28]=[C:27]([C:29]2[CH:34]=[C:33]([F:35])[CH:32]=[C:31]([F:36])[CH:30]=2)[O:26][N:25]=1

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 249856324-chloro-2-(difluoromethyl)-1H-indole-5-carbonitrileHCID 431202093-(Chloromethyl)-5-(3,5-difluorophenyl)-1,2,4-oxadiazole

Product 1

HCID 247644714-Chloro-2-(difluoromethyl)-1-{[5-(3,5-difluorophenyl)-1,2,4-oxadiazol-3-yl]methyl}-1H-indole-5-carbonitrileYield 77%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
95 °C

Procedure

To a solution of 4-chloro-2-(difluoromethyl)-1H-indole-5-carbonitrile (0.23 g, 1.0 mmol) in anhydrous MeCN (5 mL) was added Cs2CO3 (0.38 g, 1.15 mmol) and 3-(chloromethyl)-5-(3,5-difluorophenyl)-1,2,4-oxadiazole (0.27 g, 1.15 mmol). The mixture was heated in a sealed tube at 95° C., under N2, for 1 h. Upon cooling, the mixture was partitioned between EtOAc and water. The organic phase was washed with water and sat'd brine, dried (Na2SO4) and concentrated in vacuo. The residue was purified by flash chromatography (2-30% EtOAc-hexanes gradient) and the product was crystallized from CH2Cl2-hexanes to afford the title compound as a white solid (0.32 g, 77% yield): 1H NMR (400 MHz, acetone-d6) δ 7.91 (d, J=8.8 Hz, 1H), 7.74 (d, J=8.8 Hz, 1H), 7.70 (m, 2H), 7.45 (t, J=53.4 Hz, 1H), 7.42 (tt, J=9.0, 2.4 Hz, 1H), 7.20 (s, 1H), 5.95 (s, 2H); MS (ES) m/z 421 (M+1).

Workup

  1. temperatureUpon cooling
  2. customthe mixture was partitioned between EtOAc and water
  3. washThe organic phase was washed with water
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash chromatography (2-30% EtOAc-hexanes gradient)
  7. customthe product was crystallized from CH2Cl2-hexanes

Sources & evidence

ORD record
ord-c069fd78f36145c186d765fc77df6ae4
Source dataset
uspto-grants-2009_08
Patent number
US07572820B2

Reaction notes

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