Cesium carbonate → 1-(Cyanomethyl)-2-propyl-4-(trifluoromethyl)-1H-indole-5-carbonitrile

HRID 913658Notes

Reaction equation

HRID 913658 reaction equation
[CH2:1]([C:4]1[NH:5][C:6]2[C:11]([CH:12]=1)=[C:10]([C:13]([F:16])([F:15])[F:14])[C:9]([C:17]#[N:18])=[CH:8][CH:7]=2)[CH2:2][CH3:3].C([O-])([O-])=O.[Cs+].[Cs+].Br[CH2:26][C:27]#[N:28]>C(#N)C>[C:27]([CH2:26][N:5]1[C:6]2[C:11](=[C:10]([C:13]([F:15])([F:16])[F:14])[C:9]([C:17]#[N:18])=[CH:8][CH:7]=2)[CH:12]=[C:4]1[CH2:1][CH2:2][CH3:3])#[N:28]

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 11534BromoacetonitrileHCID 674051552-propyl-4-(trifluoromethyl)-1H-indole-5-carbonitrile

Product 1

HCID 578005151-(Cyanomethyl)-2-propyl-4-(trifluoromethyl)-1H-indole-5-carbonitrileYield 95.4%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 2-propyl-4-(trifluoromethyl)-1H-indole-5-carbonitrile (Example 153A) (1.00 g, 3.96 mmol) in anhydrous acetonitrile (55 mL) was added Cs2CO3 (6.5 g, 20.0 mmol) and bromoacetonitrile (0.713 g, 5.95 mmol). The mixture was heated under N2, for 2 h. Upon cooling, the mixture was partitioned between EtOAc and water. The organic phase was separated, dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography (0-20% EtOAc-hexanes gradient) to afford a pure product (1.1 g, 92% yield): MS (ES) m/z 292 (M+1).

Workup

  1. temperatureThe mixture was heated under N2, for 2 h
  2. temperatureUpon cooling
  3. customthe mixture was partitioned between EtOAc and water
  4. customThe organic phase was separated
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by flash chromatography (0-20% EtOAc-hexanes gradient)

Sources & evidence

ORD record
ord-69664c615916403393b331cc89f9fbc9
Source dataset
uspto-grants-2011_09
Patent number
US08026262B2

Reaction notes

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