Ethanol → HCID 44546563, compound

Participants

Reaction Steps

5-Amino-3-bromo-2-(3-cyano-5-fluoro-benzenesulfonyl)-thieno[2,3-b]pyridine (1.25 g, 30 mmol) was dissolved in toluene (18 ml) and ethanol (20 ml) under argon atmosphere. To the solution Pd(PPh3)4 (175 mg, 0.15 mmol), 3-chlorophenylboronic acid (0.58 g, 37 mmol) and 2M solution of Na2CO3 (15 ml) was added. The reaction mixture was refluxed for 1 hour then it was filtered through celite and washed with toluene (2×5 ml). 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 under vacuum. The crude product was purified by column chromatography (Kieselgel 60, ethyl acetate:hexane=2:1) to yield the title compound which was purified by stirring with methanol (5 ml) to give 0.84 g (63%) yellow amorphous material. LC-MS: (M+H)+ 444.2. 1H NMR (400 MHz, DMSO-d6, 25° C.): 5.68 (s, 2H); 6.80 (d, J=2.6 Hz, 1H); 7.13-7.22 (m, 2H); 7.53 (t, J=7.9 Hz, 1H); 7.56-7.65 (m, 3H); 8.24 (dm, J=8.4 Hz, 1H); 8.27 (d, J=2.6 Hz, 1H).

Provenance & Evidence