Methyl iodide → 1-Methyl-7-nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepine

HRID 1686945Notes

Reaction equation

HRID 1686945 reaction equation
[N+:1]([C:4]1[CH:14]=[CH:13][C:7]2[NH:8][CH2:9][CH2:10][CH2:11][CH2:12][C:6]=2[CH:5]=1)([O-:3])=[O:2].[C:15](=O)([O-])[O-].[K+].[K+].IC.[H-].[Na+]>CN(C=O)C>[CH3:15][N:8]1[CH2:9][CH2:10][CH2:11][CH2:12][C:6]2[CH:5]=[C:4]([N+:1]([O-:3])=[O:2])[CH:14]=[CH:13][C:7]1=2

Participants

6

Reactant 4

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 24758Sodium hydrideHCID 158877537-Nitro-2,3,4,5-tetrahydro-1H-benzo[B]azepine

Product 1

HCID 672643011-Methyl-7-nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepineYield 100%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 7-Nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepine (192 mg, 1.0 mmol) in DMF (10 mL) was treated with potassium carbonate (345 mg, 2.5 eq), and iodomethane (0.08 mL, 1.25 eq) and stirred at room temperature for 30 min. Sodium hydride was added (1.5 eq) and the mixture stirred for 30 min, quenched with water and extracted with ether. The organic layers washed with brine and dried (MgSO4), filtered and concentrated to give 1-Methyl-7-nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepine (206 mg, 100%) as a yellow solid. MP: 52-54° C.; 1H-NMR (CDCl3) δ 7.97 (s, 1H), 7.89 (dd, J=2.6, 8.7 Hz, 1H), 6.61 (d, J=8.7 Hz, 1H), 4.42 (br s, 1H), 2.88-2.84 (m, 2H), 1.89-1.78 (m, 4H); LC/MS (ESI+): 207.04 (M+H).

Workup

  1. stirringthe mixture stirred for 30 min
  2. customquenched with water
  3. extractionextracted with ether
  4. washThe organic layers washed with brine
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-000b780be1ad4049ac4745156831cb34
Source dataset
uspto-grants-2012_04
Patent number
US08148391B2

Reaction notes

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