Hydrochloric Acid → 4-Chloro-N-[5-chloro-2-(2-methanesulfonylamino-benzoyl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamide

HRID 1898098Notes

Reaction equation

HRID 1898098 reaction equation
[NH2:1][C:2]1[CH:31]=[CH:30][CH:29]=[CH:28][C:3]=1[C:4]([C:6]1[C:11]([NH:12][S:13]([C:16]2[CH:21]=[CH:20][C:19]([Cl:22])=[C:18]([C:23]([F:26])([F:25])[F:24])[CH:17]=2)(=[O:15])=[O:14])=[CH:10][C:9]([Cl:27])=[CH:8][N:7]=1)=[O:5].[CH3:32][S:33](Cl)(=[O:35])=[O:34].Cl.CCCC[N+](CCCC)(CCCC)CCCC.[F-]>N1C=CC=CC=1.C1COCC1>[Cl:22][C:19]1[CH:20]=[CH:21][C:16]([S:13]([NH:12][C:11]2[C:6]([C:4](=[O:5])[C:3]3[CH:28]=[CH:29][CH:30]=[CH:31][C:2]=3[NH:1][S:33]([CH3:32])(=[O:35])=[O:34])=[N:7][CH:8]=[C:9]([Cl:27])[CH:10]=2)(=[O:15])=[O:14])=[CH:17][C:18]=1[C:23]([F:26])([F:25])[F:24]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 31297Methanesulfonyl chlorideHCID 2724141Tetrabutylammonium FluorideHCID 57942118N-[2-(2-amino-benzoyl)-5-chloro-pyridin-3-yl]-4-chloro-3-trifluoromethyl-benzenesulfonamide

Product 1

HCID 579422154-Chloro-N-[5-chloro-2-(2-methanesulfonylamino-benzoyl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamide

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of N-[2-(2-amino-benzoyl)-5-chloro-pyridin-3-yl]-4-chloro-3-trifluoromethyl-benzenesulfonamide (24 mg, 0.048 mmol) in anhydrous pyridine (1 mL) was added methane sulfonyl chloride (9 mg, 0.075 mmol). The resulting mixture was stirred at room temperature for 2 h was poured into 1 M HCl and extracted with EtOAc. The extracts were concentrated under reduced pressure and the residues was purified by flash column chromatography to trissulfonamide Mass spectrum m/z: 515.0 (M+H). To this trisulfonamide (14 mg, 0.021 mmol) in THF was added TBAF (1 M in THF, 40 L, 0.04 mmol) and the resulting mixture was stirred overnight. The reaction mixture was quenched with 1 M HCl and extracted with EtOAc. The combined extracts were dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by flash column chromatography on silica gel (combi-flash) to provide 4-Chloro-N-[5-chloro-2-(2-methanesulfonylamino-benzoyl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamide. 1H NMR (400 MHz, CDCl3) δ 9.60 (br, 2 H), 8.38 (d, J=2.0 Hz, 1 H), 8.16 (d, J=2.0 Hz, 1 H), 8.04 (d, J=2.0 Hz, 1H), 7.87 (dd, J=8.4, 2.4 Hz, 1 H), 7.72-7.70 (m, 1 H), 7.62-7.57 (m, 1 H), 7.53 (d, J=8.4 Hz, 1H), 7.29 (dd, J=8.0, 2.4 Hz, 1 H), 7.08-7.05 (m, 1 H), 3.07 (s, 3H); Mass spectrum m/z: 515.0 (M+H).

Workup

  1. extractionextracted with EtOAc
  2. concentrationThe extracts were concentrated under reduced pressure
  3. customthe residues was purified by flash column chromatography
  4. stirringthe resulting mixture was stirred overnight
  5. customThe reaction mixture was quenched with 1 M HCl
  6. extractionextracted with EtOAc
  7. dry with materialThe combined extracts were dried (Na2SO4)
  8. filtrationfiltered
  9. concentrationconcentrated under reduced pressure
  10. customThe residue was purified by flash column chromatography on silica gel (combi-flash)

Sources & evidence

ORD record
ord-3b02fd8fa7764f9ab7ed9d6aac0faa27
Source dataset
uspto-grants-2013_08
Patent number
US08519135B2

Reaction notes

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