Morpholine → 4-(2,5-Difluoro-4-nitrophenyl)morpholine

HRID 1895235Notes

Reaction equation

HRID 1895235 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[C:5]([F:11])=[CH:4][C:3]=1F.[NH:13]1[CH2:18][CH2:17][O:16][CH2:15][CH2:14]1.C([O-])([O-])=O.[K+].[K+]>CS(C)=O.CCOC(C)=O>[F:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[C:5]([F:11])=[CH:4][C:3]=1[N:13]1[CH2:18][CH2:17][O:16][CH2:15][CH2:14]1

Participants

6

Reactant 3

HCID 8083MorpholineHCID 11430Potassium CarbonateHCID 750121,2,4-Trifluoro-5-nitrobenzene

Product 1

HCID 580722644-(2,5-Difluoro-4-nitrophenyl)morpholineYield 117%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 1,2,4-trifluoro-5-nitrobenzene (4.0 mL, 35 mmol), morpholine (3.1 mL, 35 mmol), and K2CO3 (4.8 g, 35 mmol) in DMSO (35 mL) was stirred at room temperature overnight. The mixture was diluted with AcOEt and washed with water and brine. The organic layer was dried over MgSO4, and concentrated under reduced pressure. The residue was recrystallized from AcOEt to give the title compound (10 g, 63% yield) as a pale yellow solid: 1H NMR (300 MHz, DMSO-d6): δ ppm 3.15-3.49 (4H, m), 3.50-3.90 (4H, m), 7.13 (1H, dd, J=14.3, 7.5 Hz), 8.01 (1H, dd, J=13.6, 7.5 Hz). LC-MS (ESI) m/z 245 [M+H]+.

Workup

  1. washwashed with water and brine
  2. dry with materialThe organic layer was dried over MgSO4
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was recrystallized from AcOEt

Sources & evidence

ORD record
ord-a4e06ac1f50e46708e098c85cbbd7c86
Source dataset
uspto-grants-2013_08
Patent number
US08513251B2

Reaction notes

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