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

Participants

Reaction Conditions

Reaction Steps

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 followed by aqueous Na2CO3 (39 mL, 20% by wt.). The resulting mixture was heated at 70° C. for 4 hours. The precipitate was filtered and rinsed with 20% aqueous Na2CO3 solution. The filtrate was diluted with water and acidified to pH=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.

Provenance & Evidence