Water → Ethyl 2-bromo-6-formyl-4-methyl-4H-thieno[3,2-b]pyrrole-5-carboxylate

HRID 1428196Notes

Reaction equation

HRID 1428196 reaction equation
[Br:1][C:2]1[S:9][C:8]2[C:7]([CH:10]=[O:11])=[C:6]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[NH:5][C:4]=2[CH:3]=1.[C:17](=O)([O-])[O-].[K+].[K+].IC.O>CN(C=O)C.CCOC(C)=O>[Br:1][C:2]1[S:9][C:8]2[C:7]([CH:10]=[O:11])=[C:6]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[N:5]([CH3:17])[C:4]=2[CH:3]=1

Participants

7

Reactant 4

HCID 962WaterHCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 58386865Ethyl 2-bromo-6-formyl-4H-thieno[3,2-b]pyrrole-5-carboxylate

Product 1

HCID 58386867Ethyl 2-bromo-6-formyl-4-methyl-4H-thieno[3,2-b]pyrrole-5-carboxylateYield 82%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of aldehyde 62 (515 mg, 1.70 mmol) in DMF (5 mL) was added potassium carbonate (707 mg, 5.12 mmol) and iodomethane (0.27 mL, 3.40 mmol) and the resulting mixture was stirred at room temperature for 2 hr. To the mixture was added H2O (30 mL) and EtOAc (50 mL) and the organic layer was separated and washed with brine and dried over Na2SO4. After removing the organic solvent under reduced pressure, the residue was purified by column chromatography (EtOAc/Hexane: 1/8) to give the desired N-methylated product 63 (440 mg, 82%) as a white solid.

Workup

  1. customthe organic layer was separated
  2. washwashed with brine
  3. dry with materialdried over Na2SO4
  4. customAfter removing the organic solvent under reduced pressure
  5. customthe residue was purified by column chromatography (EtOAc/Hexane: 1/8)

Sources & evidence

ORD record
ord-a49cd2d785894474a5e54828b1fe3945
Source dataset
uspto-grants-2015_01
Patent number
US08937067B2

Reaction notes

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