Related Products of 29241-65-4, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 29241-65-4, name is 5-Bromo-2-chloronicotinic acid. A new synthetic method of this compound is introduced below.
Preparation 1775-Bromo-2-chloronicotinamide To a suspension of 5-bromo-2-chloronicotinic acid (20 g, 84.6 mmol) and oxalyl chloride (12.9 g,101.5 mmol) in DCM (500 mL) was added DMF (618 mg, 8.46 mmol) at room temperature. Thereaction effervesced and was stirred for 3 hours before concentrating to half volume in vacuo. The resulting solution was added carefully to a solution of 7N methanolic ammonia (50 mL) in DCM (200 mL) at -10C, and the reaction was stirred for 18 hours at room temperature. The reaction was concentrated in vacuo, diluted with EtOAc (1 L), washed with water (500 mL), dried over sodium sulphate and concentrated in vacuo. The residue was triturated with cold DCM (200mL) to afford the title compound as a colourless solid (16.3 g, 82%). 1H NMR (400 MHz, DMSO-d6): O ppm 7.81 (s, 1H), 8.08 (s, 1H), 8.21 (d, 1H), 8.63 (d, 1H).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,29241-65-4, its application will become more common.
Reference:
Patent; PFIZER LIMITED; SKERRATT, Sarah Elizabeth; BAGAL, Sharanjeet Kaur; SWAIN, Nigel Alan; OMOTO, Kiyoyuki; ANDREWS, Mark David; WO2015/92610; (2015); A1;,
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