O-Phenylenediamine → HCID 43344060, compound

HRID 730232Notes

Reaction equation

HRID 730232 reaction equation
[C:1]1([NH2:8])[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH2:7].[Cl:9][C:10]1[CH:11]=[C:12]([S:17](Cl)(=[O:19])=[O:18])[CH:13]=[CH:14][C:15]=1[Cl:16]>C(Cl)Cl.N1C=CC=CC=1>[NH2:7][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][C:1]=1[NH:8][S:17]([C:12]1[CH:13]=[CH:14][C:15]([Cl:16])=[C:10]([Cl:9])[CH:11]=1)(=[O:19])=[O:18]

Participants

5

Reactant 2

HCID 7243O-PhenylenediamineHCID 7383Benzenesulfonyl chloride, 3,4-dichloro-

Product 1

HCID 43344060HCID 43344060, compoundYield 59.9%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6344DichloromethaneSolvent2×

Procedure

To a solution of o-phenylenediamine (4 mmol) in DCM (20 mL) and pyridine (4 mL) at 0° C., 3,4-dichlorobenzenesulfonyl chloride (4.4 mmol) was added in small portions. The reaction mixture was then gradually warmed to RT with stirring continued until the reaction was complete as determined by TLC or LC-MS. The reaction mixture was then diluted with DCM (20 mL). The organic phase was washed with water (2×20 mL) and 20 mL of brine. The organic phase was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue obtained was purified by flash column chromatography eluting with DCM/EtOAc to give 760 mg of N-(2-amino-phenyl)-3,4-dichloro-benzenesulfonamide. LC: Tr 0.98 min, MS: 317.0 (M+1)+; 1H NMR (CDCl3, 400 MHz): δ 4.95 (bs, 2H), 6.45 (t, 1H), 6.11 (d, 1H), 6.72 (d, 1H), 6.92 (t, 1H), 7.59 (dd, 1H), 7.80 (d, 3H) ppm.

Workup

  1. washThe organic phase was washed with water (2×20 mL) and 20 mL of brine
  2. dry with materialThe organic phase was dried over anhydrous sodium sulfate
  3. concentrationconcentrated under vacuum
  4. customThe residue obtained
  5. customwas purified by flash column chromatography
  6. washeluting with DCM/EtOAc

Sources & evidence

ORD record
ord-8d3ba4c959994c69b35ba22a4de40f87
Source dataset
uspto-grants-2009_09
Patent number
US07582673B2

Reaction notes

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