Nitric Acid → 5-Dichloroacetamido-4-nitro-1-(2,3,6-trichloro-4-trifluoromethyl-phenyl)-pyrazole

HRID 34857Notes

Reaction equation

HRID 34857 reaction equation
C(OC(=O)C)(=O)C.[N+:8]([O-:11])(O)=[O:9].[Cl:12][CH:13]([Cl:35])[C:14]([NH:16][C:17]1[N:21]([C:22]2[C:27]([Cl:28])=[CH:26][C:25]([C:29]([F:32])([F:31])[F:30])=[C:24]([Cl:33])[C:23]=2[Cl:34])[N:20]=[CH:19][CH:18]=1)=[O:15]>C(O)(=O)C>[Cl:35][CH:13]([Cl:12])[C:14]([NH:16][C:17]1[N:21]([C:22]2[C:27]([Cl:28])=[CH:26][C:25]([C:29]([F:32])([F:31])[F:30])=[C:24]([Cl:33])[C:23]=2[Cl:34])[N:20]=[CH:19][C:18]=1[N+:8]([O-:11])=[O:9])=[O:15]

Participants

5

Reactant 3

HCID 944Nitric AcidHCID 7918Acetic AnhydrideHCID 139134305-Dichloroacetamido-1-(2,3,6-trichloro-4-trifluoromethyl-phenyl)-pyrazole

Product 1

HCID 139134475-Dichloroacetamido-4-nitro-1-(2,3,6-trichloro-4-trifluoromethyl-phenyl)-pyrazoleYield 76.4%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

1.2 ml (0.0129 mol) of acetic anhydride and 0.6 ml (0.0143 mol) of 98% strength nitric acid are added in succession to 5 g (0.0113 mol) of 5-dichloroacetamido-1-(2,3,6-trichloro-4-trifluoromethyl-phenyl)-pyrazole in 10 ml of glacial acetic acid at room temperature. The mixture is stirred for 20 hours, after which it is evaporated down in vacuo, the residue is taken up in 50 ml of dichloromethane and the solution is washed in succession with saturated sodium bicarbonate solution and saturated sodium chloride solution. The organic phase is dried over magnesium sulphate and freed from the solvent in vacuo. 4.2 g (76.4% of theory) of 5-dichloroacetamido-4-nitro-1-(2,3,6-trichloro-4-trifluoromethyl-phenyl)-pyrazole of melting point 112° C.-120° C. are obtained.

Workup

  1. customafter which it is evaporated down in vacuo
  2. washthe solution is washed in succession with saturated sodium bicarbonate solution and saturated sodium chloride solution
  3. dry with materialThe organic phase is dried over magnesium sulphate

Sources & evidence

ORD record
ord-ab6b7f94f8af400198e19d6319e1a668
Source dataset
uspto-grants-1988_08
Patent number
US04764202

Reaction notes

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