Reference of 55404-31-4, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.55404-31-4, name is 3-Bromo-2-chloro-4-methylpyridine, molecular formula is C6H5BrClN, molecular weight is 206.47, as common compound, the synthetic route is as follows.
3-Bromo-2-(4-methoxybenzyloxy)-4-methylpyridine 3-bromo-2-(4-methoxybenzyloxy)-4-methylpyridine was prepared by the procedure described in J. Med. Chem., 2008, 51, 3065. A pressure vessel was charged with anhydrous THF (25 ml) and sodium hydride (1.44 g, 36.18 mmol, 60% dispersion). To this stirred mixture was added portionwise a solution of 4-methoxybenzyl alcohol (5.0 g, 36.18 mmol) in anhydrous THF (15 ml). After addition was complete, the mixture was stirred at room temperature for 30 minutes and a solution of 3-bromo-2-chloro-4-picoline (4.97 g, 24.08 mmol) in anhydrous THF (15 ml) was added. The vessel was sealed and the reaction mixture was heated at 75 C. for 6 hours. Upon cooling to room temperature, the reaction mixture was partitioned between ethyl acetate and water. The separated organic layer was washed with water, sat’d NaCl(aq.), dried over MgSO4, filtered, and concentrated. Elution through a flash column (silica gel 60, 230-400 mesh, 4:1 hexanes:EtOAc) gave the title compound as a clear oil which crystallized on standing (6.71 g, 90%).
The chemical industry reduces the impact on the environment during synthesis 55404-31-4, I believe this compound will play a more active role in future production and life.
Reference:
Patent; Allergan, Inc.; Wurster, Julie; Yee, Richard; Hull III, Clarence Eugene; Malone, Thomas C.; (39 pag.)US2016/96832; (2016); A1;,
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