Thionyl Chloride → 5-Amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyano-4-trifluoromethylsulfinylpyrazole

HRID 1871565Notes

Reaction equation

HRID 1871565 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]3[C:13](=[CH:14][C:15]=2[Cl:16])[C:12]([F:18])([F:17])[O:11][C:10]3([F:20])[F:19])[N:5]=[C:4]([C:21]#[N:22])[CH:3]=1.[F:23][C:24]([F:29])([F:28])[S:25]([O-])=[O:26].[Na+].S(C1C=CC(C)=CC=1)(O)(=O)=O.CNC.S(Cl)(Cl)=O>C1(C)C=CC=CC=1.O>[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]3[C:13](=[CH:14][C:15]=2[Cl:16])[C:12]([F:18])([F:17])[O:11][C:10]3([F:20])[F:19])[N:5]=[C:4]([C:21]#[N:22])[C:3]=1[S:25]([C:24]([F:29])([F:28])[F:23])=[O:26]

Participants

7

Reactant 4

HCID 24386Thionyl ChlorideHCID 12199009Dimethylamine p-toluenesulfonateHCID 154773495-Amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyanopyrazoleHCID 23690734Sodium trifluoromethanesulfinate

Product 1

HCID 186915175-Amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyano-4-trifluoromethylsulfinylpyrazoleYield 18.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 1140TolueneSolvent

Conditions

Temperature
55 °C

Procedure

To a suspension wherein 5-amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyanopyrazole (600 mg, 1.80 mmol), sodium trifluoro-methanesulfinate (366 mg, 2.35 mmol) and dimethylamine tosylate (587 mg, 2.70 mmol) are in toluene (5 ml), thionyl chloride (278 mg, 2.34 mmol) was added dropwise over a period of about 10 minutes and then stirred at 50 to 60° C. for 10 hours. After allowing time to cool, the reaction solution was poured into water, extracted with ethyl acetate, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure and the residue was subjected to silica gel column chromatography to give 150 mg of 5-amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyano-4-trifluoromethylsulfinylpyrazole.

Workup

  1. temperatureto cool
  2. extractionextracted with ethyl acetate
  3. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
  4. distillationThe solvent was distilled off under reduced pressure

Sources & evidence

ORD record
ord-8847effbec794a3e80eeb35403cd0a5c
Source dataset
uspto-grants-2000_08
Patent number
US06103750

Reaction notes

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