Sodium Hydroxide → 4-Amino-2-fluoro-N-methylbenzenesulfonamide

HRID 2261628Notes

Reaction equation

HRID 2261628 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([NH:13]C(=O)C)[CH:5]=[CH:6][C:7]=1[S:8](=[O:12])(=[O:11])[NH:9][CH3:10].[OH-].[Na+]>Cl>[NH2:13][C:4]1[CH:5]=[CH:6][C:7]([S:8]([NH:9][CH3:10])(=[O:12])=[O:11])=[C:2]([F:1])[CH:3]=1

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 34029456N-(3-fluoro-4-methylsulfamoylphenyl)acetamide

Product 1

HCID 617181244-Amino-2-fluoro-N-methylbenzenesulfonamideYield 83.2%

Reagents, catalysts & solvents 1

HCID 313Hydrochloric AcidSolvent

Procedure

The above prepared N-(3-fluoro-4-methylsulfamoylphenyl)acetamide (1.55 g, 6.3 mmol) was suspended in 40 mL of 6M HCl and heated to reflux for 1 hr. The reaction was cooled in an ice bath and an NaOH solution was added to adjust the mixture to pH 5. The resulting white precipitate was isolated by filtration and was washed with water and dried to yield 1.07 g (83%) of the title compound. MS (m/z, ES+): 205.0 (M+1, 100%); 1H NMR (500 MHz, ppm, DMSO-d6): 7.35 (m, 1H), 7.12 (m, 1H), 6.40 (m, 2H), 6.23 (s, 2H), 2.40 (s, 3H).

Workup

  1. temperatureheated
  2. temperatureto reflux for 1 hr
  3. temperatureThe reaction was cooled in an ice bath
  4. customThe resulting white precipitate was isolated by filtration
  5. washwas washed with water
  6. customdried

Sources & evidence

ORD record
ord-94e2edfb879049569d66151799caf5a2
Source dataset
uspto-grants-2010_12
Patent number
US07847101B2

Reaction notes

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