1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → t-Butyl 4-[(5-cyano-2-benzofuranyl)carbonylamino]phenoxyacetate

HRID 1290981Notes

Reaction equation

HRID 1290981 reaction equation
[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[O:10][C:9]([C:11]([OH:13])=O)=[CH:8][C:7]=2[CH:14]=1)#[N:2].[NH2:15][C:16]1[CH:30]=[CH:29][C:19]([O:20][CH2:21][C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])=[CH:18][CH:17]=1.ON1C2C=CC=CC=2N=N1.CN(C)CCCN=C=NCC>CN(C)C=O.O>[C:1]([C:3]1[CH:4]=[CH:5][C:6]2[O:10][C:9]([C:11]([NH:15][C:16]3[CH:17]=[CH:18][C:19]([O:20][CH2:21][C:22]([O:24][C:25]([CH3:26])([CH3:28])[CH3:27])=[O:23])=[CH:29][CH:30]=3)=[O:13])=[CH:8][C:7]=2[CH:14]=1)#[N:2]

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 102360545-cyanobenzofuran-2-carboxylic AcidHCID 22060435Tert-butyl 2-(4-aminophenoxy)acetate

Product 1

HCID 10620519t-Butyl 4-[(5-cyano-2-benzofuranyl)carbonylamino]phenoxyacetateYield 82%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

5-Cyano-2-benzofurancarboxylic acid (300 mg, 1.60 mmol) and t-butyl 4-aminophenoxyacetate (395 mg, 1.76 mmol) were dissolved in N,N-dimethylformamide (40 ml), and 1-hydroxy-1H-benzotriazole (238 mg, 1.76 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (342 mg, 1.76 mmol) were added. The mixture was stirred at room temperature for 18 hours. Water (100 ml) was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, and dried over anhydrous magnesium sulfate. After filtration, low boiling matters were distilled away from the filtrate under reduced pressure and the residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=1/1) to give 512 mg of t-butyl 4-[(5-cyano-2-benzofuranyl)carbonylamino]phenoxyacetate as a pale-yellow solid (82%).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with water and saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationAfter filtration, low boiling matters
  5. distillationwere distilled away from the filtrate under reduced pressure
  6. customthe residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=1/1)

Sources & evidence

ORD record
ord-84dd0822e5564de2a1eb18773eb39676
Source dataset
uspto-grants-1998_05
Patent number
US05753670

Reaction notes

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