p-Toluidine → 3-(3-p-Tolylsulfamoyl-phenyl)-acrylic acid methyl ester

HRID 2217653Notes

Reaction equation

HRID 2217653 reaction equation
[CH3:1][O:2][C:3](=[O:16])[CH:4]=[CH:5][C:6]1[CH:11]=[CH:10][CH:9]=[C:8]([S:12](Cl)(=[O:14])=[O:13])[CH:7]=1.[CH3:17][C:18]1[CH:24]=[CH:23][C:21]([NH2:22])=[CH:20][CH:19]=1.C([O-])(O)=O.[Na+]>O1CCOCC1.O>[CH3:1][O:2][C:3](=[O:16])[CH:4]=[CH:5][C:6]1[CH:11]=[CH:10][CH:9]=[C:8]([S:12](=[O:14])(=[O:13])[NH:22][C:21]2[CH:23]=[CH:24][C:18]([CH3:17])=[CH:19][CH:20]=2)[CH:7]=1

Participants

6

Reactant 3

HCID 7813p-ToluidineHCID 516892Sodium BicarbonateHCID 737087423-(3-Chlorosulfonylphenyl)acrylic acid methyl ester

Product 1

HCID 670195113-(3-p-Tolylsulfamoyl-phenyl)-acrylic acid methyl esterYield 79.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent2×

Procedure

A solution of 3-(3-chlorosulfonylphenyl)-acrylic acid methyl ester (3) (2.0 g, 7.23 mmol) in dioxane (10 ml) was added to a mixture of 4-methylaniline (0.77 g, 7.23 mmol) in dioxane (20 ml) and NaHCO3 (1.2 g, 14.5 mmol) in water (20 ml), and the resultant solution was stirred at room temperature for one hour. The reaction mixture was evaporated and the residue was partitioned between ethyl acetate and 2N HCl. The organic layer was washed successively with water, saturated NaCl, and dried (Na2SO4). The solvent was removed and the residue was chromatographed on silica gel with dichloromethane-ethyl acetate (20:1, v/v) as eluent. The obtained product was washed with diethyl ether to give the title compound (1.9 g, 79%). 1H NMR (DMSO-d6, HMDSO), δ: 2.16 (3H, s); 3.69 (3H, s); 6.65 (1H, d, J=16.0 Hz); 7.00 (4H, s); 7.49-8.11 (5H, m); 10.14 (1H, br s).

Workup

  1. customThe reaction mixture was evaporated
  2. customthe residue was partitioned between ethyl acetate and 2N HCl
  3. washThe organic layer was washed successively with water, saturated NaCl
  4. dry with materialdried (Na2SO4)
  5. customThe solvent was removed
  6. customthe residue was chromatographed on silica gel with dichloromethane-ethyl acetate (20:1
  7. washThe obtained product was washed with diethyl ether

Sources & evidence

ORD record
ord-b42c9c6cd914429681ac9cd67f66cdce
Source dataset
uspto-grants-2008_08
Patent number
US07407988B2

Reaction notes

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