Sodium Carbonate → 4'-Trifluoromethyl-biphenyl-3-carboxylic acid

HRID 1675243Notes

Reaction equation

HRID 1675243 reaction equation
[F:1][C:2]([F:13])([F:12])[C:3]1[CH:8]=[CH:7][C:6](B(O)O)=[CH:5][CH:4]=1.Br[C:15]1[CH:16]=[C:17]([CH:21]=[CH:22][CH:23]=1)[C:18]([OH:20])=[O:19].C([O-])([O-])=O.[Na+].[Na+]>CC(O)C.O.[Pd]>[F:1][C:2]([F:13])([F:12])[C:3]1[CH:8]=[CH:7][C:6]([C:15]2[CH:16]=[C:17]([CH:21]=[CH:22][CH:23]=2)[C:18]([OH:20])=[O:19])=[CH:5][CH:4]=1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 114563-Bromobenzoic acidHCID 27343894-(Trifluoromethyl)phenylboronic acid

Product 1

HCID 27827184'-Trifluoromethyl-biphenyl-3-carboxylic acid

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 21889133Propan-2-ol--water (1/1)Solvent

Conditions

Temperature
70 °C

Procedure

The Suzuki coupling was carried out according to the method of Dyer et al. (2001) Tetrahedron Letters 42: 1765-1767. Commercially available 4-(trifluoromethyl)phenylboronic acid (15 g, 78.7 mmol) and 3-bromobenzoic acid (15.1 g, 75 mmol) were suspended in 2-propanol:water (1:4, 72 mL). 10% Pd/C (1.5 g) was added and then aqueous Na2CO3 (39 mL, 20% by weight) was added. The resulting mixture was heated at 70° C. for 4 hours. The precipitate was filtered and rinsed with a 20% aqueous Na2CO3 solution. The filtrate was diluted with water and acidified to a pH of 2. The white solid was filtered and dried in vacuo. The crude material (2.1) (19.69 g) was used in the next step without further purification

Workup

  1. filtrationThe precipitate was filtered
  2. washrinsed with a 20% aqueous Na2CO3 solution
  3. additionThe filtrate was diluted with water
  4. filtrationThe white solid was filtered
  5. customdried in vacuo
  6. customThe crude material (2.1) (19.69 g) was used in the next step without further purification

Sources & evidence

ORD record
ord-9c966639f6584caea46f21785703adc7
Source dataset
uspto-grants-2011_08
Patent number
US08003648B2

Reaction notes

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