Chlorosuccinimide → HCID 21938656, compound

HRID 1280839Notes

Reaction equation

HRID 1280839 reaction equation
[F:1][C:2]1[CH:8]=[C:7]([O:9][C:10](=[O:15])[C:11]([CH3:14])([CH3:13])[CH3:12])[CH:6]=[CH:5][C:3]=1[NH2:4].[Cl:16]N1C(=O)CCC1=O>FC1C=CC=CC=1>[Cl:16][C:5]1[CH:6]=[C:7]([O:9][C:10](=[O:15])[C:11]([CH3:12])([CH3:14])[CH3:13])[CH:8]=[C:2]([F:1])[C:3]=1[NH2:4]

Participants

4

Reactant 2

HCID 31398ChlorosuccinimideHCID 21938659HCID 21938659, compound

Product 1

HCID 21938656HCID 21938656, compound

Reagents, catalysts & solvents 1

HCID 10008FluorobenzeneSolvent

Procedure

A mixture of 7.3 g (0.035 mol) of 2-fluoro-4-pivaloyloxyaniline and 5.1 g (0.038 mol) of N-chlorosuccinimide in 50 ml of fluorobenzene is heated to reflux under a nitrogen atmosphere for two hours. After cooling to room temperature, the solvent is removed, water is added, and the mixture is extracted with ethyl acetate. The organic layer is washed with 1 N sodium hydroxide, and saturated brine, and dried over magnesium sulfate. Filtration and removal of the solvents gives a residue which is purified by silica gel chromatography (20% ethyl acetate/hexane) to give 2-chloro-4-pivaloyloxy-6-fluoroaniline.

Workup

  1. temperatureis heated
  2. temperatureto reflux under a nitrogen atmosphere for two hours
  3. customthe solvent is removed
  4. additionwater is added
  5. extractionthe mixture is extracted with ethyl acetate
  6. washThe organic layer is washed with 1 N sodium hydroxide, and saturated brine
  7. dry with materialdried over magnesium sulfate
  8. filtrationFiltration and removal of the solvents
  9. customgives a residue which
  10. customis purified by silica gel chromatography (20% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-c2440edbc7934ecbbdfb6bc5b2dd5b69
Source dataset
uspto-grants-2002_09
Patent number
US06451858B2

Reaction notes

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