Hydrochloric Acid → N-(2,4-difluorophenyl)-3-methoxybenzenesulfonamide

HRID 250575Notes

Reaction equation

HRID 250575 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[NH2:9].N1C=CC=CC=1.[CH3:16][O:17][C:18]1[CH:19]=[C:20]([S:24](Cl)(=[O:26])=[O:25])[CH:21]=[CH:22][CH:23]=1.Cl>C(Cl)Cl>[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[NH:9][S:24]([C:20]1[CH:21]=[CH:22][CH:23]=[C:18]([O:17][CH3:16])[CH:19]=1)(=[O:26])=[O:25]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 1049PyridineHCID 97092,4-DifluoroanilineHCID 27375043-Methoxybenzenesulfonyl chloride

Product 1

HCID 58086624N-(2,4-difluorophenyl)-3-methoxybenzenesulfonamide

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To 2,4-difluoro-phenylamine (42, 0.44 mL, 4.4 mmol) in methylene chloride (10.0 mL), under an atmosphere of nitrogen, were added pyridine (1.00 mL, 12.4 mmol) and 3-methoxy-benzenesulfonyl chloride (1.00 g, 4.84 mmol). After 12 hours, the reaction was poured into cold 1 M HCl and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 20% ethyl acetate in hexane to give light yellow solid (91, 0.90 g, 69%). MS (ESI) [M+H+]+=300.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated
  6. custompurified by silica gel column chromatography
  7. washeluting with 20% ethyl acetate in hexane
  8. customto give light yellow solid (91, 0.90 g, 69%)

Sources & evidence

ORD record
ord-78d44bfae3c04c62ab2b9a004f38a5b8
Source dataset
uspto-grants-2011_01
Patent number
US07863288B2

Reaction notes

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