Triethylamine → Methyl 3-(4-(3-methyl-5-(trifluoromethyl)phenyl)oxazol-2-yl)propanoate

HRID 534852Notes

Reaction equation

HRID 534852 reaction equation
Br[C:2]1[CH:3]=[C:4]([C:12]2[N:13]=[C:14]([CH2:17][CH2:18][C:19]([O:21][CH3:22])=[O:20])[O:15][CH:16]=2)[CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1.[CH3:23]B(O)O.C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:23][C:2]1[CH:3]=[C:4]([C:12]2[N:13]=[C:14]([CH2:17][CH2:18][C:19]([O:21][CH3:22])=[O:20])[O:15][CH:16]=2)[CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 139377Methylboronic AcidHCID 66750877Methyl 3-(4-(3-bromo-5-(trifluoromethyl)phenyl)oxazol-2-yl)propanoate

Product 1

HCID 66751235Methyl 3-(4-(3-methyl-5-(trifluoromethyl)phenyl)oxazol-2-yl)propanoateYield 78%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

A stirred solution of methyl 3-(4-(3-bromo-5-(trifluoromethyl)phenyl)oxazol-2-yl)propanoate (Reference Example 44, 0.150 g, 0.397 mmol), methylboronic acid (0.071 g, 1.19 mmol), and triethylamine (0.402 g, 3.97 mmol) in DMF (10.0 mL) was degassed and then purged with nitrogen. To this reaction mixture was added tetrakis(triphenylphosphine)palladium(0) (0.024 g, 0.0203 mmol) and the resulting reaction mixture was heated at 100° C. for 6 h. After this time, the mixture was cooled to room temperature, diluted with ethyl acetate (50 mL), washed with water and saturated sodium chloride, dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by flash column chromatography (silica gel, hexanes/ethyl acetate 9:1) to provide methyl 3-(4-(3-methyl-5-(trifluoromethyl)phenyl)oxazol-2-yl)propanoate (0.097 g, 78%) as a viscous yellow oil.

Workup

  1. custompurged with nitrogen
  2. customthe resulting reaction mixture
  3. temperatureAfter this time, the mixture was cooled to room temperature
  4. washwashed with water and saturated sodium chloride
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by flash column chromatography (silica gel, hexanes/ethyl acetate 9:1)

Sources & evidence

ORD record
ord-1787623ed6324fa0a7257cbccb819aac
Source dataset
uspto-grants-2014_10
Patent number
US08853215B2

Reaction notes

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