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Nitric Acid → 2-(p-Chlorophenyl)-3-nitro-5[(trifluoromethyl)thio]pyrrole

HRID 129629
Notes
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Reaction equation

HRID 129629 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[NH:9][C:10]([S:13][C:14]([F:17])([F:16])[F:15])=[CH:11][CH:12]=2)=[CH:4][CH:3]=1.[N+:18]([O-:21])([OH:20])=[O:19]>C(O)(=O)C>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[NH:9][C:10]([S:13][C:14]([F:15])([F:17])[F:16])=[CH:11][C:12]=2[N+:18]([O-:20])=[O:19])=[CH:6][CH:7]=1.[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[NH:9][C:10]([S:13][C:14]([F:16])([F:15])[F:17])=[C:11]([N+:18]([O-:21])=[O:19])[CH:12]=2)=[CH:6][CH:7]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 944Nitric AcidHCID 189304232-(p-Chlorophenyl)-5-[(trifluoromethyl)thio]pyrrole

Product 2

HCID 189303872-(p-Chlorophenyl)-3-nitro-5[(trifluoromethyl)thio]pyrroleHCID 189304055-(p-Chlorophenyl)-3-nitro-2-[(trifluoromethyl)thio]pyrrole

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

A solution of 2-(p-chlorophenyl)-5-[(trifluoromethyl)thio]pyrrole (1.0 g, 0.0036 mol) in acetic acid is cooled with an ice bath, treated with nitric acid (0.24 g, 0.00378 mol), stirred for two hours, poured into ice-water and stirred for one hour. The aqueous solution is filtered and the filter cake is washed with water and dried in a vacuum dessicator to obtain a tan solid. Flash chromatography of the solid using silica gel and a 1:10 ethyl acetate/hexanes solution gives 2-(p-chlorophenyl)-3-nitro-5-[(trifluoromethyl)thio]pyrrole as a yellow solid (0.45 g, mp 143°-145° C.) and 5-(p-chlorophenyl)-3-nitro-2-[(trifluoromethyl)thio]pyrrole as a yellow solid (0.17 g, mp 185°-193° C.). Both products are identified by 1HNMR, 19FNMR and 13CNMR spectral analyses.

Workup

  1. stirringstirred for one hour
  2. filtrationThe aqueous solution is filtered
  3. washthe filter cake is washed with water
  4. customdried in a vacuum dessicator
  5. customto obtain a tan solid

Sources & evidence

ORD record
ord-1a2f85dd19e341c599af60d8ed67b042
Source dataset
uspto-grants-1995_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05468877

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes