72754-05-3, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 6-Bromo-1,8-naphthyridin-2-ol, cas is 72754-05-3,the naphthyridine compound, it is a common compound, a new synthetic route is introduced below.
Boronic acid 7: To a solution of compound 6 (10 g, 44.44 mmol) in dry tetrahydrofuran (350 mL) was added sodium hydride (2 g, 66.66 mmol, 80% dispersion) at 0 C. After the mixture was stirred at room temperature for 30 min, the mixture was cooled below -60 C. in a dry ice/acetone bath, and n-butyllithium (70 mL, 112 mmol, 1.6 M in hexane) was added over 30 min. The mixture was kept stirring for another 30 min, then triisopropyl borate (40 mL, 177 mmol) was added dropwise. The reaction mixture was stirred for 10 min, and then warmed to 0 C. slowly in an ice bath. HCl (5 N) was added to the mixture to adjust pH=3-4, and the mixture was stirred for 20 min. Aq. NaOH was added to the mixture to adjust pH=10. After filtration, the organic layer was separated. The aqueous layer was extracted with a mixture of ethyl acetate/THF (4/1; 2¡Á120 mL) and EtOAc (100 mL). The aqueous layer was adjusted to pH=5-6 with HCl. The precipitate thus formed was collected by filtration and dried to give boronic acid 7 (3.5 g, 41%) as a white solid
Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 6-Bromo-1,8-naphthyridin-2-ol, 72754-05-3
Reference£º
Patent; OTSUKA PHARMACEUTICAL CO., LTD.; ABUDUSAIMI, Mamuti; YE, Fangguo; SUN, Jiangqin; MIYAMOTO, Hisashi; CHENG, Jay-Fei; OKA, Daisuke; US2014/179675; (2014); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem