Thiophosgene → 1,5-Dichloro-2-isothiocyanato-3-methylbenzene

HRID 1628503Notes

Reaction equation

HRID 1628503 reaction equation
[C:1](Cl)(Cl)=[S:2].[Cl:5][C:6]1[CH:12]=[C:11]([Cl:13])[CH:10]=[C:9]([CH3:14])[C:7]=1[NH2:8]>O1CCCC1.C(=O)([O-])O.[Na+]>[Cl:5][C:6]1[CH:12]=[C:11]([Cl:13])[CH:10]=[C:9]([CH3:14])[C:7]=1[N:8]=[C:1]=[S:2]

Participants

5

Reactant 2

HCID 10040ThiophosgeneHCID 12682872,4-Dichloro-6-methylaniline

Product 1

HCID 27360131,5-Dichloro-2-isothiocyanato-3-methylbenzeneYield 58%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 516892Sodium BicarbonateSolvent2×

Procedure

Thiophosgene (17.0 g, 148 mmol) was added dropwise to a stirred mixture of 2,4-dichloro-6-methylaniline (20.0 g, 114 mmol) in tetrahydrofuran (100 mL) and saturated aqueous sodium hydrogen carbonate (100 mL) at 0° C., and the mixture was stirred at room temperature for 90 minutes. The mixture was diluted with saturated aqueous sodium hydrogen carbonate, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was washed with n-hexane to give the title compound as a colorless powder (14.4 g, 66.0 mmol, 58%).

Workup

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. washThe residue was washed with n-hexane

Sources & evidence

ORD record
ord-08d23939953b4891af48b607a722e0b9
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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