Methyl iodide → Methyl 6-bromo-4-iodonicotinate

HRID 1502400Notes

Reaction equation

HRID 1502400 reaction equation
[Br:1][C:2]1[CH:10]=[C:9]([I:11])[C:5]([C:6]([OH:8])=[O:7])=[CH:4][N:3]=1.[C:12](=O)([O-])[O-].[K+].[K+].CI>CN(C)C=O.C(OCC)(=O)C>[Br:1][C:2]1[CH:10]=[C:9]([I:11])[C:5]([C:6]([O:8][CH3:12])=[O:7])=[CH:4][N:3]=1

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 582662986-Bromo-4-iodonicotinic acid

Product 1

HCID 86674963Methyl 6-bromo-4-iodonicotinateYield 83%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 6-bromo-4-iodonicotinic acid (75 mg, 0.23 mmol), potassium carbonate (63 mg, 0.46 mmol), and methyl iodide (0.017 mL, 0.27 mmol) in N,N-dimethylformamide (0.5 mL) was heated at 60° C. for 30 minutes. The cooled reaction mixture was diluted with ethyl acetate (20 mL) and washed with water (15 mL). The organic layer was separated, dried over sodium sulfate, filtered, and evaporated in vacuo to afford a residue that was purified by flash chromatography (silica, 4 g, ISCO, 0-50% ethyl acetate in heptane) to afford the title compound as a white solid (65 mg, 83%), which was used in the next step without further purification.

Workup

  1. customThe cooled reaction mixture
  2. washwashed with water (15 mL)
  3. customThe organic layer was separated
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customto afford a residue that
  8. customwas purified by flash chromatography (silica, 4 g, ISCO, 0-50% ethyl acetate in heptane)

Sources & evidence

ORD record
ord-35f745f8d0d14f11bd62fa0c65f1577e
Source dataset
uspto-grants-2015_12
Patent number
US09206175B2

Reaction notes

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