Dichloromethane → 5-Chloro-2-[3-(2-sulfo-ethylsulfanylmethyl)-benzoylamino]-benzoic acid methyl ester

HRID 1094976Notes

Reaction equation

HRID 1094976 reaction equation
[Cl:1][C:2]1[CH:3]=C(N)C(C(=O)C2C=CC=C(CCl)C=2)=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].C([N:25]([CH2:28][CH3:29])CC)C.[Na+].[SH:31][CH2:32][CH2:33][S:34]([O-:37])(=[O:36])=[O:35].CO[C:40]1[CH:41]=[C:42]([CH:46]=[CH:47][C:48]=1OC)[C:43](Cl)=[O:44].[CH2:51](Cl)Cl>>[CH3:10][O:9][C:7](=[O:8])[C:6]1[CH:11]=[C:2]([Cl:1])[CH:3]=[CH:29][C:28]=1[NH:25][C:43](=[O:44])[C:42]1[CH:46]=[CH:47][CH:48]=[C:40]([CH2:51][S:31][CH2:32][CH2:33][S:34]([OH:37])(=[O:36])=[O:35])[CH:41]=1

Participants

6

Reactant 5

HCID 6344DichloromethaneHCID 8471TriethylamineHCID 77070Veratroyl chlorideHCID 23662354MesnaHCID 66638758Methyl 5-chloro-2-[3-(chloromethyl)benzoyl]-aminobenzoate

Product 1

HCID 870861295-Chloro-2-[3-(2-sulfo-ethylsulfanylmethyl)-benzoylamino]-benzoic acid methyl ester

Conditions

Temperature
40 °C

Procedure

Subsequently, methyl 5-chloro-2-[3-(chloromethyl)benzoyl]-aminobenzoate (1.8 g) was dissolved in anhydrous methylene chloride. Triethylamine (1.5 ml) and 2-mercaptoethanesulfonic acid sodium salt (compound B′) (1.3 g) were added to the solution at room temperature, and the mixture was stirred at 40° C. for 4 days. After the completion of the reaction, distilled water was added thereto at room temperature, and the mixture was subjected to separatory extraction with chloroform. The organic layer was washed with a saturated aqueous sodium chloride solution, was dried over sodium sulfate, and was then concentrated. The residue was purified by column chromatography on silica gel to give 5-chloro-2-[3-(2-sulfo-ethylsulfanylmethyl)-benzoylamino]-benzoic acid methyl ester as a useful intermediate (1.08 g, yield 46.1%).

Workup

  1. customAfter the completion of the reaction
  2. distillationdistilled water
  3. additionwas added
  4. extractionat room temperature, and the mixture was subjected to separatory extraction with chloroform
  5. washThe organic layer was washed with a saturated aqueous sodium chloride solution
  6. dry with materialwas dried over sodium sulfate
  7. concentrationwas then concentrated
  8. customThe residue was purified by column chromatography on silica gel

Sources & evidence

ORD record
ord-6c301c6f957048f0bf7ca5629f25e1f5
Source dataset
uspto-grants-2012_03
Patent number
US08134015B2

Reaction notes

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