反应详情

温度

90 °C

2-chloro-4-iodopyridine (0.500 g, 2 mmol) was dissolved in 1,4-dioxane (15 ml), then N-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-yl)acetamide (0.800 g, 3 mmol), tetrakis(triphenylphosphine)palladium(0) (0.300 g, 0.3 mmol) and 2M sodium carbonate (2 ml, 4 mmol) was added to the mixture. The round-bottom flask was fitted with a reflux condenser and placed into a pre-heated (90° C.) bath. The mixture was allowed to stir under inert atmosphere for 3 hours. The progress of the reaction was monitored by LC/MS, which showed desired product in the mixture. The material was allowed to cool to ambient temperature and diluted with DCM and saturated sodium bicarbonate solution. The organic layer was collected by extracting with DCM (3×20 ml). Combined organics, dried over sodium sulfate, filtered and concentrated in vacuo. The residue was diluted with ethyl ether (50 ml) and allowed to stir 10 minutes. The precipitate was collected by filtration and washed with ethyl ether. This gave N-(6-(2-chloropyridin-4-yl)benzo[d]thiazol-2-yl)acetamide (0.200 g, 32% yield) as a tan crystalline solid. MS (ESI pos. ion) m/z: 304 (MH+). Calc'd exact mass for C14H10ClN3OS: 303. 1H NMR (400 MHz, DMSO-d6): 2.23 (s, 3H), 7.80-7.86 (m, 2H), 7.90-7.95 (m, 2H), 8.47 (d, J=5.09 Hz, 1H), 8.54 (s, 1H), 12.49 (s, 1H).

1. customThe round-bottom flask was fitted with a reflux condenser