Methyl 3-(chlorosulfonyl)-4-methoxybenzoate → 3-[2-(Benzo[b]thiophene-2-sulfonylamino)phenylsulfamoyl]-4-methoxybenzoic acid methyl ester

HRID 730207Notes

Reaction equation

HRID 730207 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[NH:8][S:9]([C:12]1[S:16][C:15]2[CH:17]=[CH:18][CH:19]=[CH:20][C:14]=2[CH:13]=1)(=[O:11])=[O:10].Cl[S:22]([C:25]1[CH:26]=[C:27]([CH:32]=[CH:33][C:34]=1[O:35][CH3:36])[C:28]([O:30][CH3:31])=[O:29])(=[O:24])=[O:23]>C(Cl)Cl.N1C=CC=CC=1>[CH3:31][O:30][C:28](=[O:29])[C:27]1[CH:32]=[CH:33][C:34]([O:35][CH3:36])=[C:25]([S:22](=[O:23])(=[O:24])[NH:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=2[NH:8][S:9]([C:12]2[S:16][C:15]3[CH:17]=[CH:18][CH:19]=[CH:20][C:14]=3[CH:13]=2)(=[O:11])=[O:10])[CH:26]=1

Participants

5

Reactant 2

HCID 2794613Methyl 3-(chlorosulfonyl)-4-methoxybenzoateHCID 86240018Benzo[b]thiophene-2-sulfonic acid (2-aminophenyl)amide

Product 1

HCID 116851903-[2-(Benzo[b]thiophene-2-sulfonylamino)phenylsulfamoyl]-4-methoxybenzoic acid methyl esterYield 65.7%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6344DichloromethaneSolvent2×

Procedure

To a solution of benzo[b]thiophene-2-sulfonic acid (2-aminophenyl)-amide (1 mmol) in DCM (2 mL) and pyridine (2 mL), methyl 3-(chlorosulfonyl)-4-methoxybenzoate (1.1 mmol) was added at RT and the reaction mixture was then allowed to stir at RT overnight. The reaction mixture was then diluted with DCM (10 mL). The organic phase was washed with 10% aqueous HCl (10 mL), water (10 mL) and brine (10 mL). 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 obtain 350 mg of 3-[2-(benzo[b]thiophene-2-sulfonylamino)phenylsulfamoyl]-4-methoxybenzoic acid methyl ester. Tr 1.10 min, MS: 533.7 (M+1)+. 1H NMR (CDCl3, 400 MHz): δ 3.84 (s, 3H), 4.18 (s, 3H), 7.0-7.2 (m, 5H), 7.4-7.6 (m, 3H), 7.66 (s, 1H), 7.80 (d, 1H), 7.83 (d, 1H), 8.22 (dd, 1H), 8.34 (d, 1H) ppm.

Workup

  1. washThe organic phase was washed with 10% aqueous HCl (10 mL), water (10 mL) and brine (10 mL)
  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-489cef9e3c8142ecbab82c1b31076875
Source dataset
uspto-grants-2009_09
Patent number
US07582673B2

Reaction notes

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