Methyl iodide → Methyl 1-methyl-1H-indole-3-carboxylate

HRID 18224

Reaction equation

HRID 18224 reaction equation
[H-].[Na+].[NH:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([C:12]([O:14][CH3:15])=[O:13])=[CH:4]1.[CH3:16]I>CN(C=O)C.O>[CH3:16][N:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([C:12]([O:14][CH3:15])=[O:13])=[CH:4]1

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydride2×HCID 589098Methyl indole-3-carboxylate

Product 1

HCID 842006Methyl 1-methyl-1H-indole-3-carboxylateYield 96.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

NaH (60% dispersion in mineral oil, 8.56 g, 214.0 mmole) was added portionwise, allowing for gas evolution, to a solution of methyl 1H-indole-3-carboxylate (25.00 g, 142.7 mmole) in DMF (350 mL) at 0° C. When the NaH addition was complete, methyl iodide (44.4 mL, 713.5 mmole) was added at 0° C. The reaction was stirred at 0° C. for 15 minutes then at RT overnight. The reaction was diluted with water and extracted with ethyl acetate. The combined extracts were dried over K2CO3 and concentrated to afford the title compound (26.00 g, 96%) as an orange solid: MS (ES) m/e 190 (M+H)+.

Workup

  1. customat RT
  2. customovernight
  3. extractionextracted with ethyl acetate
  4. dry with materialThe combined extracts were dried over K2CO3
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-e33291da5609424f8925caf051acbfd2
Source dataset
uspto-grants-2010_06
Patent number
US07741339B2

Linked notes

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