(Trifluoromethyl)trimethylsilane → 5-[2-(4-Bromo-2-chloro-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-3-methyl-3H-benzooxazol-2-one

HRID 2096823Notes

Reaction equation

HRID 2096823 reaction equation
[F:1][C:2]([Si](C)(C)C)([F:4])[F:3].[Br:9][C:10]1[CH:15]=[CH:14][C:13]([CH:16]([CH3:30])[C:17]([C:19]2[CH:20]=[CH:21][C:22]3[O:26][C:25](=[O:27])[N:24]([CH3:28])[C:23]=3[CH:29]=2)=[O:18])=[C:12]([Cl:31])[CH:11]=1.O.O.O.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>C1COCC1>[Br:9][C:10]1[CH:15]=[CH:14][C:13]([CH:16]([CH3:30])[C:17]([C:19]2[CH:20]=[CH:21][C:22]3[O:26][C:25](=[O:27])[N:24]([CH3:28])[C:23]=3[CH:29]=2)([OH:18])[C:2]([F:4])([F:3])[F:1])=[C:12]([Cl:31])[CH:11]=1

Participants

6

Reactant 4

HCID 552549(Trifluoromethyl)trimethylsilaneHCID 2724141Tetrabutylammonium FluorideHCID 11726816Tetrabutylammonium Fluoride TrihydrateHCID 666971065-[2-(4-Bromo-2-chloro-phenyl)-propionyl]-3-methyl-3H-benzooxazol-2-one

Product 1

HCID 666969815-[2-(4-Bromo-2-chloro-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-3-methyl-3H-benzooxazol-2-oneYield 67%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Trifluoromethyltrimethylsilane (2M in THF, 1.13 mL) was added at 0° C. to a solution of 5-[2-(4-bromo-2-chloro-phenyl)-propionyl]-3-methyl-3H-benzooxazol-2-one (404 mg) in THF (8 mL) followed by the addition of tetrabutylammonium fluoride trihydrate (65 mg). Stirring was continued for 2 hours at 0° C. More tetrabutylammonium fluoride (1M in THF, 0.82 mL) was added to the reaction mixture and stirring was continued for 1 hour at 0° C. The reaction mixture was poured into ice/water and extracted two times with ethyl acetate. The combined organic layers were washed with brine, dried over Na2SO4, filtered and the solvent was evaporated. The residue was purified by flash chromatography (silica gel, CH2Cl2:MeOH=100:0 to 96:4) to give the title compound as a colorless foam (320 mg, 67%). MS (m/e)=466.1 [M+H+].

Workup

  1. stirringstirring
  2. waitwas continued for 1 hour at 0° C
  3. extractionextracted two times with ethyl acetate
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. customthe solvent was evaporated
  8. customThe residue was purified by flash chromatography (silica gel, CH2Cl2:MeOH=100:0 to 96:4)

Sources & evidence

ORD record
ord-2a7026c4cd754593af5a06b0b974de23
Source dataset
uspto-grants-2013_05
Patent number
US08450313B2

Reaction notes

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