4-Chloro-3-methylbenzene-1-sulfonyl chloride → HCID 86606891, compound

HRID 419024

Reaction equation

HRID 419024 reaction equation
[Br:1][C:2]1[C:7]([NH2:8])=[CH:6][C:5]([Cl:9])=[CH:4][N:3]=1.[CH3:10][C:11]1[CH:12]=[C:13]([S:18](Cl)(=[O:20])=[O:19])[CH:14]=[CH:15][C:16]=1[Cl:17]>N1C=CC=CC=1>[Br:1][C:2]1[C:7]([NH:8][S:18]([C:13]2[CH:14]=[CH:15][C:16]([Cl:17])=[C:11]([CH3:10])[CH:12]=2)(=[O:19])=[O:20])=[CH:6][C:5]([Cl:9])=[CH:4][N:3]=1

Participants

4

Reactant 2

HCID 2210014-Chloro-3-methylbenzene-1-sulfonyl chlorideHCID 27696403-Amino-2-bromo-5-chloropyridine

Product 1

HCID 86606891HCID 86606891, compound

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a stirred solution of 2-bromo-5-chloro-pyridin-3-ylamine (4.12 g, 20 mmol) in anhydrous pyridine (100 mL) was added 3-methyl-4-chlorobenzenesulfonyl chloride (6.35 g, 26 mmol) and the progress of the reaction was followed by LCMS. The reaction mixture was stirred overnight (18 h), then concentrated to remove as much of the pyridine as possible. The residue was dissolved in THF and was stirred 18 h with aqueous sodium hydroxide (20 mL) in THF to cleave the bis-sulfonamide. The reaction mixture was subsequently neutralized with aqueous HCl and extracted with EtOAc; the organic phase was washed with water (2×100 mL), brine, and then dried (MgSO4), filtered, and concentrated under reduced pressure. The residue was purified by chromatography on silica gel using EtOAc-hexane to provide N-(2-bromo-5-chloro-pyridin-3-yl)-4-chloro-3-methyl-benzenesulfonamide as a white crystalline solid. MS m/z 397.1 (M+H).

Workup

  1. concentrationconcentrated
  2. customto remove as much of the pyridine as possible
  3. dissolutionThe residue was dissolved in THF
  4. stirringwas stirred 18 h with aqueous sodium hydroxide (20 mL) in THF
  5. extractionextracted with EtOAc
  6. washthe organic phase was washed with water (2×100 mL), brine
  7. dry with materialdried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated under reduced pressure
  10. customThe residue was purified by chromatography on silica gel

Sources & evidence

ORD record
ord-d7b683a7dafe4d749cce0363d76258ba
Source dataset
uspto-grants-2012_01
Patent number
US08093247B2

Linked notes

Loading…