(4-Chloro-3-cyanophenyl)boronic acid → 4'-Chloro-3'-cyano-4-[4-(3,4-dichloro-phenyl)-thiazol-2-yl]-biphenyl-2-carboxylic acid

Participants

Reaction Steps

Using the conditions of General Procedure B for Suzuki Coupling and Hydrolysis in Parallel Mode, 2-bromo-5-[4-(3,4-dichloro-phenyl)-thiazol-2-yl]-benzoic acid methyl ester (which may be prepared as described for Intermediate 6; 89 mg, 0.2 mmol) was reacted with 4-chloro-3-cyanophenylboronic acid (available from Combi-Blocks Inc.; 73 mg, 0.4 mmol). The resulting ester was hydrolyzed and the acid was purified to give 4′-chloro-3′-cyano-4-[4-(3,4-dichloro-phenyl)-thiazol-2-yl]-biphenyl-2-carboxylic acid (18 mg, 19%). 1H NMR (400 MHz, DMSO-d6) δ 13.35 (br s, 1H), 8.44-8.51 (m, 2H), 8.34 (d, J=2.0 Hz, 1H), 8.28 (dd, J=8.0, 1.8 Hz, 1H), 8.09 (dd, J=8.5, 2.0 Hz, 1H), 8.06 (d, J=2.3 Hz, 1H), 7.82 (d, J=8.5 Hz, 1H), 7.77 (d, J=8.5 Hz, 1H), 7.74 (dd, J=8.5, 2.3 Hz, 1H), 7.61 (d, J=8.0 Hz, 1H).

Provenance & Evidence