反应详情

温度

25 °C

2°) A solution of 0.19 g of N-phenyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)imidazo[1,2-a]pyridine-2-carboxamide hydrobromide (1:1) in 9 mL of acetonitrile is treated with 0.5 mL of hydrochloric acid and 1 g of polymer-supported benzeneboronic acid (Alfa-Aesar L19459, ˜3 mmol/g). The reaction mixture is stirred for 16 hours at 25° C. and then refluxed for 1 hour. The resin is filtered off, washed with acetonitrile and then with methanol and the combined filtrates are evaporated to dryness under reduced pressure to give 160 mg of 2-phenylcarbamoylimidazo[1,2-a]pyridine-6-boronic acid hydrochloride (1:1) in the form of an orange-coloured solid.

1. temperaturerefluxed for 1 hour
2. filtrationThe resin is filtered off
3. washwashed with acetonitrile
4. customwith methanol and the combined filtrates are evaporated to dryness under reduced pressure