m-Chloroperbenzoic acid → HCID 22618454, compound

HRID 1416818Notes

Reaction equation

HRID 1416818 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:17])([F:16])[F:15])=[CH:9][C:8]=2[Cl:18])[N:5]=[C:4]([C:19]([F:22])([F:21])[F:20])[C:3]=1[S:23][CH3:24].ClC1C=CC=C(C(OO)=[O:33])C=1>C(Cl)(Cl)Cl.ClCCl>[NH2:1][C:2]1[N:6]([C:7]2[C:12]([Cl:13])=[CH:11][C:10]([C:14]([F:15])([F:16])[F:17])=[CH:9][C:8]=2[Cl:18])[N:5]=[C:4]([C:19]([F:21])([F:20])[F:22])[C:3]=1[S:23]([CH3:24])=[O:33]

Participants

5

Reactant 2

HCID 70297m-Chloroperbenzoic acidHCID 22618553HCID 22618553, compound

Product 1

HCID 22618454HCID 22618454, compound

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 6344DichloromethaneSolvent

Procedure

A stirred solution of 5-amino-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-methylthio-3-trifluoromethylpyrazole (1.0 g) in chloroform (40 ml) was treated with m-chloroperbenzoic acid (0.42 g), portionwise at room temperature. After stirring for 6 hours, the solution was diluted with dichloromethane and washed in turn with solidum sulphite solution, sodium hydroxide solution, and water. The solution was dried over anhydrous magnesium sulphate, and evaporated in vacuo to give a yellow oil. Purification by chromatography on silica (Merck, 230-400 mesh, 0.7 kg cm-2) eluting with dichloromethane-ethylacetate (4:1) gave 5-amino-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-methylsulphinyl-3-trifluoromethylpyrazole in the form of a white solid, m.p. 142-145° C. with decomposition.

Workup

  1. washwashed in turn with solidum sulphite solution, sodium hydroxide solution, and water
  2. dry with materialThe solution was dried over anhydrous magnesium sulphate
  3. customevaporated in vacuo
  4. customto give a yellow oil
  5. customPurification by chromatography on silica (Merck, 230-400 mesh, 0.7 kg cm-2)
  6. washeluting with dichloromethane-ethylacetate (4:1)

Sources & evidence

ORD record
ord-8fff819d874f464ca743736aa52e1483
Source dataset
uspto-grants-1999_06
Patent number
US05916618

Reaction notes

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