Pyridine → HCID 20775760, compound

Participants

Reaction Steps

To a solution of 3-Amino-5-phenyl-thiophene-2-carboxylic acid methyl ester (1 g, 4.29 mmol) in dichloromethane (50 ml) was added phenyl boronic acid (1.05 g, 8.6 mmol), pyridine (680 mg, 8.6 mmol) and copper(II) acetate (1.18 g, 6.5 mmol). The reaction mixture was stirred for 16 h at room temperature. Then, the reaction mixture was filtered through celite, concentrated and the residue was purified by flash chromatography (9:1 Hexane/EtOAc) to obtain 435 mg (33%) of 5-Phenyl-3-phenylamino-thiophene-2-carboxylic acid methyl ester. NMR 1H (CDCl3, 400 MHz): 7.38 ppm (dd, 2H, Haro); 7.35-7.26 ppm (m, 5H, Haro); 7.19 ppm (s, 1H, Haro); 7.15 ppm (dd, 2H, Haro); 7.02 ppm (ddt, 1H, Haro); 3.82 ppm (s, 3H).

Provenance & Evidence