Methyl iodide → 4-{3-[2,6-bis(trifluoromethyl)pyridin-4-yl]-3-(trifluoromethyl)-3,4-dihydro-2H-pyrrol-5-yl}-2-bromobenzyl acetate

HRID 1958630Notes

Reaction equation

HRID 1958630 reaction equation
CC([O-])(C)C.[K+].[C:7]([O:10][CH2:11][C:12]1[CH:17]=[CH:16][C:15]([C:18](=S)[NH:19][CH2:20][Si](C)(C)C)=[CH:14][C:13]=1[Br:26])(=[O:9])[CH3:8].IC.[F:29][C:30]([F:48])([F:47])[C:31]1[CH:36]=[C:35]([C:37]([C:39]([F:42])([F:41])[F:40])=[CH2:38])[CH:34]=[C:33]([C:43]([F:46])([F:45])[F:44])[N:32]=1.[N+](CCCC)(CCCC)(CCCC)CCCC.[F-]>C1COCC1.C(OC)(C)(C)C>[C:7]([O:10][CH2:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[CH2:38][C:37]([C:35]3[CH:36]=[C:31]([C:30]([F:29])([F:47])[F:48])[N:32]=[C:33]([C:43]([F:46])([F:44])[F:45])[CH:34]=3)([C:39]([F:42])([F:41])[F:40])[CH2:20][N:19]=2)=[CH:14][C:13]=1[Br:26])(=[O:9])[CH3:8]

Participants

8

Reactant 5

HCID 6328Methyl iodideHCID 2724141Tetrabutylammonium FluorideHCID 23665647Potassium tert-butoxideHCID 580920912-Bromo-4-{[(trimethylsilyl)methyl]carbamothioyl}benzyl acetateHCID 866646212,6-Bis(trifluoromethyl)-4-(3,3,3-trifluoroprop-1-en-2-yl)pyridine

Product 1

HCID 866646224-{3-[2,6-bis(trifluoromethyl)pyridin-4-yl]-3-(trifluoromethyl)-3,4-dihydro-2H-pyrrol-5-yl}-2-bromobenzyl acetateYield 37.6%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 15413tert-Butyl methyl etherSolvent

Procedure

Under argon atmosphere, t-BuOK (0.36 g) was slowly added to 2-bromo-4-{[(trimethylsilyl)methyl]carbamothioyl}benzyl acetate (1.0 g) and iodomethane (0.45 g) in THF at −10° C., and the resultant mixture was stirred for 30 minutes at the same temperature. 2,6-bis(trifluoromethyl)-4-(3,3,3-trifluoroprop-1-en-2-yl)pyridine (1.1 g) was added to the reaction mixture, and then n-Bu4NF in TI-IF (0.25 ml, 1M solution) was slowly added to the mixture at −10° C. under argon atmosphere. After stirring the resultant blend for 30 minutes at the same temperature, the blend was allowed to slowly warm to room temperature. The blend was stirred at room temperature overnight. The blend was diluted with t-BuOMe, and washed with 1N HCl and brine. The organic layer was dried over MgSO4. The solvent was evaporated under reduced pressure and the residue was purified by column chromatography to get the targeted product (0.58 g).

Workup

  1. stirringThe blend was stirred at room temperature overnight
  2. washwashed with 1N HCl and brine
  3. dry with materialThe organic layer was dried over MgSO4
  4. customThe solvent was evaporated under reduced pressure
  5. customthe residue was purified by column chromatography

Sources & evidence

ORD record
ord-4a67fce24c5c42468d0a44f0df7e0b3a
Source dataset
uspto-grants-2013_04
Patent number
US08410141B2

Reaction notes

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