Chlorosuccinimide → HCID 86644437, compound

HRID 2404513Notes

Reaction equation

HRID 2404513 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[CH:12]=[C:11]([S:13][CH2:14][C:15]([F:18])([F:17])[F:16])[C:10]([CH3:19])=[CH:9][C:8]=2[F:20])[N:5]=[C:4]([O:21][C:22]([F:31])([F:30])[CH:23]([F:29])[O:24][C:25]([F:28])([F:27])[F:26])[CH:3]=1.[Cl:32]N1C(=O)CCC1=O>C(#N)C>[NH2:1][C:2]1[N:6]([C:7]2[CH:12]=[C:11]([S:13][CH2:14][C:15]([F:18])([F:17])[F:16])[C:10]([CH3:19])=[CH:9][C:8]=2[F:20])[N:5]=[C:4]([O:21][C:22]([F:30])([F:31])[CH:23]([F:29])[O:24][C:25]([F:26])([F:27])[F:28])[C:3]=1[Cl:32]

Participants

4

Reactant 2

HCID 31398ChlorosuccinimideHCID 86644438HCID 86644438, compound

Product 1

HCID 86644437HCID 86644437, compound

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

0.9 g of 5-amino-1-{2-fluoro-4-methyl-5-(2,2,2-trifluoroethylthio)phenyl}-3-{1,1,2-trifluoro-2-(trifluoromethoxy)ethoxy}pyrazole was dissolved in 30 mL of acetonitrile, and 0.27 g of N-chlorosuccinimide was added under cooling with ice. After stirring for 10 minutes under cooling with ice, the solvent was distilled off under reduced pressure, extraction with ethyl acetate was carried out, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the obtained residue was purified by column chromatography (developing solvent ethyl acetate:hexane=1:4) to obtain 5-amino-4-chloro-1-{2-fluoro-4-methyl-5-(2,2,2-trifluoroethylthio)phenyl}-3-{1,1,2-trifluoro-2-(trifluoromethoxy)ethoxy}pyrazole. Then, the obtained pyrazole derivative was dissolved in 30 mL of tetrahydrofuran, and 0.3 mL of t-butyl nitrite was added under cooling with ice. After stirring at room temperature for 12 hours, the solvent was distilled off under reduced pressure, and the obtained residue was purified by column chromatography (ethyl acetate:hexane=1:10) to obtain 0.75 of 4-chloro-1-{2-fluoro-4-methyl-5-(2,2,2-trifluoroethylthio)phenyl}-3-{1,1,2-trifluoro-2-(trifluoromethoxy)ethoxy}pyrazole.

Workup

  1. temperatureunder cooling with ice
  2. temperatureunder cooling with ice
  3. distillationthe solvent was distilled off under reduced pressure, extraction with ethyl acetate
  4. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
  5. distillationThe solvent was distilled off under reduced pressure
  6. customthe obtained residue was purified by column chromatography (developing solvent ethyl acetate:hexane=1:4)

Sources & evidence

ORD record
ord-1ba58efdb326495a9a21262fd3bf5cf4
Source dataset
uspto-grants-2014_08
Patent number
US08802713B2

Reaction notes

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