Morpholine → 4-(2-Fluoro-4-nitrobenzyl)morpholine

HRID 254932Notes

Reaction equation

HRID 254932 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[CH:4][C:3]=1[CH3:11].BrN1C(=O)CCC1=O.[NH:20]1[CH2:25][CH2:24][O:23][CH2:22][CH2:21]1.C(OCC)(=O)C>C(Cl)(Cl)(Cl)Cl.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>[F:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[CH:4][C:3]=1[CH2:11][N:20]1[CH2:25][CH2:24][O:23][CH2:22][CH2:21]1

Participants

7

Reactant 4

HCID 8083MorpholineHCID 8857Ethyl AcetateHCID 67184N-bromobutanimideHCID 740252-Fluoro-4-nitrotoluene

Product 1

HCID 219550274-(2-Fluoro-4-nitrobenzyl)morpholineYield 55%

Reagents, catalysts & solvents 2

HCID 7187Benzoyl PeroxideCatalystHCID 5943Carbon TetrachlorideSolvent

Procedure

2-Fluoro-4-nitrotoluene (1.55 g, 10 mmol), N-bromosuccinimide (1.82 g, 10 mmol), and benzoyl peroxide (0.1 g, 0.4 mmol) were dissolved in CCl4 (50 mL). The mixture was heated at reflux, and irradiated with light (100 W bulb) for 4 hours. The reaction mixture was then filtered and concentrated. The residue was dissolved in THF (50 mL). Morpholine (1.91 g, 22 mmol) was added to it. The mixture was stirred at ambient temperature for 1 hour and then filtered. The filtrate was evaporated. The bright orange residue was purified by column chromatography eluted with hexane:ethyl acetate, 10:1 to provide 4-(2-fluoro-4-nitrobenzyl)morpholine (1.32 g, 5.5 mmol, yield 55%).

Workup

  1. temperatureThe mixture was heated
  2. temperatureat reflux
  3. customirradiated with light (100 W bulb) for 4 hours
  4. filtrationThe reaction mixture was then filtered
  5. concentrationconcentrated
  6. dissolutionThe residue was dissolved in THF (50 mL)
  7. filtrationfiltered
  8. customThe filtrate was evaporated
  9. customThe bright orange residue was purified by column chromatography
  10. washeluted with hexane

Sources & evidence

ORD record
ord-1f0d58fdd02945cbb88db14fdd94fc01
Source dataset
uspto-grants-2011_01
Patent number
US07875728B2

Reaction notes

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