Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 716362-10-6, name is 6-Chloro-4-methoxynicotinic acid. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C7H6ClNO3
Triethylamine (7.0 mL, 51 mmol) was added to a suspension of 6-chloro-4-methoxynicotinic acid (2.615 g, 13.94 mmol, Intermediate 66) in MeCN (93 mL). N-(3-Dimethylaminopropyl)-N?-ethylcarbodiimide hydrochloride (3.74 g, 19.5 mmol), HOBt (2.64 g, 19.5 mmol), and N,O-dimethylhydroxylamine hydrochloride (2.05 g, 21.0 mmol) were added, and the resulting mixture was stirred at rt for 3 days. After this time, the mixture was concentrated, and the residue was dissolved in EtOAc and water. The layers were mixed and separated, and the aqueous layer was extracted five times with EtOAc. The organic layers were combined, dried with anhydrous MgSO4, filtered, and concentrated. The residue was purified by silica gel chromatography (0?20% EtOAc/hexanes) to provide the title compound.
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Reference:
Patent; Janssen Pharmaceutica NV; Goldberg, Steven; Martin, Connor L.; Fennema, Elizabeth G.; Kummer, David A.; Nishimura, Rachel T.; Fourie, Anne M.; Xue, Xiaohua; (94 pag.)US2019/382373; (2019); A1;,
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