Tetrabutylammonium Fluoride → 5-(4-bromo-3-chloro-phenyl)-3-(3,5-dichloro-phenyl)-3-trifluoromethyl-3,4-dihydro-2H-pyrrole

HRID 241520Notes

Reaction equation

HRID 241520 reaction equation
CS[C:3](=[N:12][CH2:13][Si](C)(C)C)[C:4]1[CH:9]=[CH:8][C:7]([Br:10])=[C:6]([Cl:11])[CH:5]=1.[Cl:18][C:19]1[CH:20]=[C:21]([C:26](=[CH2:31])[C:27]([F:30])([F:29])[F:28])[CH:22]=[C:23]([Cl:25])[CH:24]=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>C1COCC1>[Br:10][C:7]1[CH:8]=[CH:9][C:4]([C:3]2[CH2:31][C:26]([C:21]3[CH:22]=[C:23]([Cl:25])[CH:24]=[C:19]([Cl:18])[CH:20]=3)([C:27]([F:28])([F:30])[F:29])[CH2:13][N:12]=2)=[CH:5][C:6]=1[Cl:11]

Participants

5

Reactant 3

HCID 2724141Tetrabutylammonium FluorideHCID 231598231,3-Dichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzeneHCID 668366594-bromo-3-chloro-N-trimethylsilanylmethyl-thiobenzimidic acid methyl ester

Product 1

HCID 866910485-(4-bromo-3-chloro-phenyl)-3-(3,5-dichloro-phenyl)-3-trifluoromethyl-3,4-dihydro-2H-pyrroleYield 74%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 4-bromo-3-chloro-N-trimethylsilanylmethyl-thiobenzimidic acid methyl ester (9.60 g, 27.4 mmol) in dry THF (100 mL) was added 2-(3,5-dichlorophenyl)-1,1,1-trifluoro-2-propene (8.94 g, 33.4 mmol) at −7° C. A solution of tetrabutyl ammoniumfluoride (5.32 mL, 1 M in THF, 5.33 mmol) was added at this temperature and the mixture was allowed to warm to room temperature over night. All volatiles were removed in vacuum. The residue was purified by flash chromatography on silica gel to give the title compound (9.50 g, 74%).

Workup

  1. customAll volatiles were removed in vacuum
  2. customThe residue was purified by flash chromatography on silica gel

Sources & evidence

ORD record
ord-594cc84a96eb451ca7cfd48e80ed4957
Source dataset
uspto-grants-2014_02
Patent number
US08653000B2

Reaction notes

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