Reaction equation
[NH:1]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[C:5](=[O:12])[CH2:4][CH2:3][CH2:2]1.C(N(CC)CC)C.[N+:20]([C:23]1[CH:31]=[CH:30][C:26]([C:27](Cl)=[O:28])=[CH:25][CH:24]=1)([O-:22])=[O:21].C(=O)(O)[O-].[Na+]>ClCCl>[N+:20]([C:23]1[CH:24]=[CH:25][C:26]([C:27]([N:1]2[C:7]3[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=3[C:5](=[O:12])[CH2:4][CH2:3][CH2:2]2)=[O:28])=[CH:30][CH:31]=1)([O-:22])=[O:21]Participants
Procedure
A 3.32 g portion of 2,3,4,5-tetrahydro-1H-1-benzazepin-5-one and 4.31 ml of triethylamine were dissolved in 33 ml of dichloromethane and, with stirring on an ice bath, 4.59 g of p-nitrobenzoyl chloride was added to the resulting solution. The reaction solution was stirred at room temperature for additional 60 minutes. The reaction solution was then mixed with a saturated sodium bicarbonate aqueous solution and subjected to phase separation. The dichloromethane layer was separated and washed with a 1N hydrochloric acid aqueous solution and a saturated sodium chloride aqueous solution once for each. The thus washed layer was dried over anhydrous magnesium sulfate and then concentrated under a reduced pressure. The thus obtained residue was recrystallized from methyl alcohol to obtain 5.68 g of 1-(4-nitrobenzoyl)-2,3,4,5-tetrahydro-1H-1-benzazepin-5-one.
Workup
- stirringThe reaction solution was stirred at room temperature for additional 60 minutes
- customsubjected to phase separation
- customThe dichloromethane layer was separated
- washwashed with a 1N hydrochloric acid aqueous solution
- dry with materialThe thus washed layer was dried over anhydrous magnesium sulfate
- concentrationconcentrated under a reduced pressure
- customThe thus obtained residue was recrystallized from methyl alcohol
Sources & evidence
- ORD record
- ord-445ecc728ecd4029a651f6f2abfe3d94
- Source dataset
- uspto-grants-1998_03
- Patent number
- US05723606
Linked notes
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