Water → 4-chloro-N-[5-chloro-2-(7-chloro-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamide

HRID 1898044Notes

Reaction equation

HRID 1898044 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([N:11]([C:15]2[C:16]([CH:22]3[C:30]4[C:25](=[CH:26][CH:27]=[CH:28][C:29]=4[Cl:31])[C:24](=[O:32])[O:23]3)=[N:17][CH:18]=[C:19]([Cl:21])[CH:20]=2)COC)(=[O:10])=[O:9])=[CH:4][C:3]=1[C:33]([F:36])([F:35])[F:34].O>Cl.O1CCOCC1>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][C:15]2[C:16]([CH:22]3[C:30]4[C:25](=[CH:26][CH:27]=[CH:28][C:29]=4[Cl:31])[C:24](=[O:32])[O:23]3)=[N:17][CH:18]=[C:19]([Cl:21])[CH:20]=2)(=[O:9])=[O:10])=[CH:4][C:3]=1[C:33]([F:36])([F:35])[F:34]

Participants

5

Reactant 2

HCID 962WaterHCID 579423744-chloro-N-[5-chloro-2-(7-chloro-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-pyridin-3-yl]-N-methoxymethyl-3-trifluoromethyl-benzene-sulfonamide

Product 1

HCID 579426114-chloro-N-[5-chloro-2-(7-chloro-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamideYield 57.2%

Reagents, catalysts & solvents 2

HCID 313Hydrochloric AcidSolventHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 4-chloro-N-[5-chloro-2-(7-chloro-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-pyridin-3-yl]-N-methoxymethyl-3-trifluoromethyl-benzene-sulfonamide (77 mg, 0.13 mmol) in 4M HCl in dioxane (3 mL) and water (1 mL) was heated at reflux for 3 h. The reaction mixture was then cooled to room temperature, evaporated to dryness and neutralized with saturated aqueous NaHCO3 solution to pH 2-3. The aqueous layer was extracted with EtOAc (2×25 mL), dried (Na2SO4), and concentrated. The obtained residue was purified by flash chromatography on silica gel (50% EtOAc-hexanes) to afford 4-chloro-N-[5-chloro-2-(7-chloro-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-pyridin-3-yl]-3-trifluoromethyl-benzenesulfonamide (40 mg) as a white solid in 56% yield. MS m/z: 537 (M+H), 559 (M+Na).

Workup

  1. temperatureat reflux for 3 h
  2. customevaporated to dryness
  3. extractionThe aqueous layer was extracted with EtOAc (2×25 mL)
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated
  6. customThe obtained residue was purified by flash chromatography on silica gel (50% EtOAc-hexanes)

Sources & evidence

ORD record
ord-eeeeb7c177c24c5f9853f3587dd0a122
Source dataset
uspto-grants-2013_08
Patent number
US08519135B2

Reaction notes

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