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

HRID 2386856Notes

Reaction equation

HRID 2386856 reaction equation
[F:1][C:2]([Si](C)(C)C)([F:4])[F:3].[Cl:9][C:10]1[CH:15]=[C:14]([O:16][CH3:17])[CH:13]=[CH:12][C:11]=1[CH:18]([CH3:32])[C:19]([C:21]1[CH:22]=[CH:23][C:24]2[O:28][C:27](=[O:29])[N:26]([CH3:30])[C:25]=2[CH:31]=1)=[O:20].O.O.O.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>C1COCC1>[Cl:9][C:10]1[CH:15]=[C:14]([O:16][CH3:17])[CH:13]=[CH:12][C:11]=1[CH:18]([CH3:32])[C:19]([C:21]1[CH:22]=[CH:23][C:24]2[O:28][C:27](=[O:29])[N:26]([CH3:30])[C:25]=2[CH:31]=1)([OH:20])[C:2]([F:4])([F:3])[F:1]

Participants

6

Reactant 4

HCID 552549(Trifluoromethyl)trimethylsilaneHCID 2724141Tetrabutylammonium FluorideHCID 11726816Tetrabutylammonium Fluoride TrihydrateHCID 666970525-[2-(2-Chloro-4-methoxy-phenyl)-propionyl]-3-methyl-3H-benzooxazol-2-one

Product 1

HCID 666969925-[2-(2-Chloro-4-methoxy-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-3-methyl-3H-benzooxazol-2-oneYield 80%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Trifluoromethyltrimethylsilane (2M in THF, 6.33 mL) was added at 0° C. to a solution of 5-[2-(2-chloro-4-methoxy-phenyl)-propionyl]-3-methyl-3H-benzooxazol-2-one (1.99 g) in THF (30 mL) followed by the addition of tetrabutylammonium fluoride trihydrate (363 mg). Stirring was continued for 2.5 hours at 0° C. More tetrabutylammonium fluoride (1M in THF, 4.60 mL) was added to the reaction mixture and stirring was continued for 30 minutes at r.t. 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 99:1) to give the title compound as a colorless foam (2.0 g, 80%). MS (m/e)=416.3 [M+H+].

Workup

  1. stirringstirring
  2. waitwas continued for 30 minutes at r.t
  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 99:1)

Sources & evidence

ORD record
ord-ff6df2b77a734523a238982d7f3acd5c
Source dataset
uspto-grants-2012_09
Patent number
US08268820B2

Reaction notes

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