Potassium Carbonate → 2-Ethyl-benzofuran-3-carboxylic acid (5-bromo-6-cyanomethoxy-naphthalen-2-ylmethyl)-methyl-amide

HRID 1357256Notes

Reaction equation

HRID 1357256 reaction equation
[Br:1][C:2]1[C:11]([OH:12])=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([CH2:13][N:14]([CH3:28])[C:15]([C:17]1[C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=3[O:19][C:18]=1[CH2:26][CH3:27])=[O:16])=[CH:7]2.Br[CH2:30][C:31]#[N:32].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C(OCC)(=O)C>[Br:1][C:2]1[C:11]([O:12][CH2:30][C:31]#[N:32])=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([CH2:13][N:14]([CH3:28])[C:15]([C:17]1[C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=3[O:19][C:18]=1[CH2:26][CH3:27])=[O:16])=[CH:7]2

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 11534BromoacetonitrileHCID 86587386HCID 86587386, compound

Product 1

HCID 120835692-Ethyl-benzofuran-3-carboxylic acid (5-bromo-6-cyanomethoxy-naphthalen-2-ylmethyl)-methyl-amideYield 72%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 2-ethyl-benzofuran-3-carboxylic acid (5-bromo-6-hydroxy-naphthalen-2-ylmethyl)-methyl-amide (0.5 g, 1.14 mmol), prepared in the previous step, bromoacetonitrile (95 μL, 1.36 mmol) and potassium carbonate (0.79 g, 5.7 mmol) in 20 mL of DMF was stirred under nitrogen at room temperature for 18 h (overnight). The reaction was diluted with ethyl acetate and extracted multiple times with water. The organic layer was dried (MgSO4) and the solvent removed under reduced pressure to give a dark brown oil. The oil was chromatographed on 50 g of silica gel (230-400 mesh) using 5% ethyl acetate in methylene chloride as the eluent. Isolation of the desire component gave 2-ethyl-benzofuran-3-carboxylic acid (5-bromo-6-cyanomethoxy-naphthalen-2-ylmethyl)-methyl-amide (0.39 g, 72%) as a light yellow foam, MS m/z: 477 [M+H]+.

Workup

  1. extractionextracted multiple times with water
  2. dry with materialThe organic layer was dried (MgSO4)
  3. customthe solvent removed under reduced pressure
  4. customto give a dark brown oil
  5. customThe oil was chromatographed on 50 g of silica gel (230-400 mesh)

Sources & evidence

ORD record
ord-a0e98bb92d2e47cb846c6161e5fadf89
Source dataset
uspto-grants-2003_07
Patent number
US06589970B2

Reaction notes

Loading…