Ethanol → HCID 44593932, compound

Participants

Reaction Steps

5-Amino-3-bromo-2-(3-cyano-5-fluoro-benzenesulfonyl)-thieno[2,3-b]pyridine (1.2 g, 29 mmol) was dissolved in toluene (16 ml) and ethanol (18 ml) under argon atmosphere. To the solution Pd(PPh3)4 (157 mg, 0.14 mmol), 3-fluorophenylboronic acid (0.50 g, 35.8 mmol) and 2M solution of Na2CO3 (14 ml) was added. The reaction mixture was refluxed for 1 hour then it was filtered through celite and washed with toluene. The filtrate was tightened in vacuum; water (13 ml) and ethyl acetate (13 ml) were added to the residue. It was separated and the water phase was extracted with ethyl acetate (2×5 ml). The organic phase was washed with water (5.0 ml), dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by column chromatography (Kieselgel 60, ethyl acetate:hexane=2:1) to yield 0.94 g (76%) of the title compound. The crude product can be purified by stirring with methanol to give a yellow amorphous material. LC-MS: (M+H)+ 428.2. 1H NMR (500 MHz, DMSO-d6, 25° C.): 5.67 (s, 2H); 6.81 (d, J=2.6 Hz, 1H); 7.00-7.07 (m, 2H); 7.35-7.43 (m, 1H); 7.50-7.60 (m, 2H); 7.60-7.64 (m, 1H); 8.20-8.25 (m, 1H); 8.27 (d, J=2.6 Hz, 1H).

Provenance & Evidence