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

HRID 1464663
Notes
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Reaction equation

HRID 1464663 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-0e00b6d4a97a4da2b8a94aaf3c63c4fa
Source dataset
uspto-grants-1994_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05306827

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes