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

HRID 1871560Notes

Reaction equation

HRID 1871560 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.[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]

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 154773515-Amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyano-4-trifluoromethylsulfenylpyrazoleYield 46.2%

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 (665 mg, 2.00 mmol), sodium trifluoro-methanesulfinate (624 mg, 4.00 mmol) and dimethylamine tosylate (1.086 g, 5.00 mmol) are in toluene (5 ml), thionyl chloride (476 mg, 2.00 mmol) was added dropwise under ice cooling over a period of about 10 minutes and 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 400 mg of 5-amino-1-(6-chloro-1,1,3,3-tetrafluoro-1,3-dihydroisobenzofuran-5-yl)-3-cyano-4-trifluoromethylsulfenylpyrazole.

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-6aa2e5c98c0844a8aee7a631585c0db5
Source dataset
uspto-grants-2000_08
Patent number
US06103750

Reaction notes

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