Potassium Carbonate → Ethyl 4-[(3-cyanophenylamino)methyl]-3-nitrobenzoate
Reaction equation
Br[CH2:2][C:3]1[CH:13]=[CH:12][C:6]([C:7]([O:9][CH2:10][CH3:11])=[O:8])=[CH:5][C:4]=1[N+:14]([O-:16])=[O:15].[NH2:17][C:18]1[CH:19]=[C:20]([CH:23]=[CH:24][CH:25]=1)[C:21]#[N:22].C(=O)([O-])[O-].[K+].[K+]>C(#N)C>[C:21]([C:20]1[CH:19]=[C:18]([NH:17][CH2:2][C:3]2[CH:13]=[CH:12][C:6]([C:7]([O:9][CH2:10][CH3:11])=[O:8])=[CH:5][C:4]=2[N+:14]([O-:16])=[O:15])[CH:25]=[CH:24][CH:23]=1)#[N:22]Participants
Conditions
- Temperature
- 70 °C
Procedure
Ethyl 4-bromomethyl-3-nitrobenzoate (26.00 g) was dissolved in 90 ml of acetonitrile, then 7.97 g of 3-aminobenzonitrile and 12.44 g of potassium carbonate were added and the mixture was stirred at 70° C. for 3 hours. The reaction solution was cooled to room temperature, and after filtration, the mother liquor was concentrated in vacuo. Ethyl acetate was added to the resulting residue. The mixture was washed with a 1N aqueous solution of hydrochloric acid and a saturated aqueous solution of sodium bicarbonate, dried over anhydrous magnesium sulfate and concentrated in vacuo. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate (80:20 to 75:25) as an eluting solvent to give 12.06 g of ethyl 4-[(3-cyanophenylamino)methyl]-3-nitrobenzoate.
Workup
- temperatureThe reaction solution was cooled to room temperature
- filtrationafter filtration
- concentrationthe mother liquor was concentrated in vacuo
- additionEthyl acetate was added to the resulting residue
- washThe mixture was washed with a 1N aqueous solution of hydrochloric acid
- dry with materiala saturated aqueous solution of sodium bicarbonate, dried over anhydrous magnesium sulfate
- concentrationconcentrated in vacuo
- customThe resulting residue was purified by silica gel column chromatography
Sources & evidence
- ORD record
- ord-0406ecc6b270440dba196ac6ac98d854
- Source dataset
- uspto-grants-2003_11
- Patent number
- US06642224B1
Reaction notes
Loading…