Water → N7-benzyl-6,7-dihydro-5H-benzocyclohepten-2,7-diamine
Reaction equation
[CH2:1]([NH:8][CH:9]1[CH:15]=[CH:14][C:13]2[CH:16]=[C:17]([N+:20]([O-])=O)[CH:18]=[CH:19][C:12]=2[CH2:11][CH2:10]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Cl-].[NH4+].O>C(O)C.O1CCOCC1.[Fe]>[CH2:1]([NH:8][CH:9]1[CH:15]=[CH:14][C:13]2[CH:16]=[C:17]([NH2:20])[CH:18]=[CH:19][C:12]=2[CH2:11][CH2:10]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 3
Procedure
A solution of N-benzyl-6,7-dihydro-2-nitro-5H-benzocyclohepten-7-amine (3.03 g) in ethanol (19 ml) and dioxane (19 ml) was added dropwise to a stirred mixture of iron powder (3.03 g) and ammonium chloride (0.36 g), in ethanol (15 ml), dioxane (15 ml), and water (15 ml) under reflux over 20 minutes. The resulting mixture was stirred under reflux for 20 minutes and the hot reaction mixture was filtered. The filtrate was evaporated in vacuo and the residue was partitioned between ethyl acetate and sodium bicarbonate aqueous solution. The organic layer was washed with brine, dried over magnesium sulfate, evaporated in vacuo, and chromatographed over silica gel using dichloromethane and methanol to afford N7 -benzyl-6,7-dihydro-5H-benzocyclohepten-2,7-diamine (2.52 g) as a brown oil.
Workup
- temperatureunder reflux for 20 minutes
- filtrationthe hot reaction mixture was filtered
- customThe filtrate was evaporated in vacuo
- customthe residue was partitioned between ethyl acetate and sodium bicarbonate aqueous solution
- washThe organic layer was washed with brine
- dry with materialdried over magnesium sulfate
- customevaporated in vacuo
- customchromatographed over silica gel
Sources & evidence
- ORD record
- ord-076315c14da34e978bbb074884fa8612
- Source dataset
- uspto-grants-1995_02
- Patent number
- US05387710
Reaction notes
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