Category: 40473-01-6

Synthetic Route of 40473-01-6, 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. 40473-01-6, name is 2-Bromo-5-chloropyridine. A new synthetic method of this compound is introduced below.

Intermediate 1 : methyl delta-chloro^-pyridinecarboxylate To a solution of 2-bromo-5-chloropyridine (30.0 g, 155.9 mmol) in MeOH (280 ml.) was added Pd(OAc)2 (3.5 g, 10.8 mmol), dppf (17.3 g, 37.96 mmol), Et3N (42.0 ml_, 312 mmol). The resulting mixture was stirred at 500C under a CO atmosphere (15 psi) for 24 h, then concentrated under reduced pressure to give crude residue. This residue was partitioned between EtOAc (3 X 500 ml.) and water (300 ml_). The combined organic layers were dried (Na2SO4) and evaporated. Flash chromatography of the residue over silica gel, by using 10:1 petroleum ether/EtOAc, afforded the title compound as a pale yellow solid (25 g, 93%): 1H NMR (400 MHz, CDCI3) delta ppm 8.60 (d, J = 1.60 Hz, 1 H), 8.01 (d, J = 8.40 Hz, 1 H), 7.75 (dd, J = 8.40, 2.40 Hz, 1 H), 3.92 (s, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,40473-01-6, its application will become more common.

Reference:
Patent; GLAXOSMITHKLINE LLC; CHRISTENSEN, Siegfried, Benjamin, IV; QIN, Donghui; CHEN, Shenglin; HUANG, Xing; LI, Di; LI, Fei; LI, Lei; LIN, Xiaojuan; LU, Shi; LU, Zhen; LV, Maoyun; WANG, Chuanning; WU, Chengde; XIAO, Mei; YU, Haiyu; ZHANG, Weina; ZHANG, Zhiliu; WO2010/141539; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 40473-01-6, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 40473-01-6, name is 2-Bromo-5-chloropyridine. This compound has unique chemical properties. The synthetic route is as follows.

I. methyl 5-chloro-2-pyridinecarboxylate To a solution of 2-bromo-5-chloropyridine (30.0 g, 155.9 mmol) in MeOH (280 mL) was added Pd(OAc)2 (3.5 g, 10.8 mmol), dppf (17.3 g, 37.96 mmol), Et3N (42.0 mL, 312 mmol). The resulting mixture was stirred at 50C under a CO atmosphere (15 psi) for 24 h, then concentrated under reduced pressure to give crude residue. This residue was partitioned between EtOAc (3 X 500 mL) and water (300 mL). The combined organic layers were dried (Na2SC>4) and evaporated. Flash chromatography of the residue over silica gel, by using 10: 1 petroleum ether/EtOAc, afforded the title compound as a pale yellow solid (25 g, 93% yield): 1H NMR (400 MHz, CDC13) delta ppm 8.60 (d, J = 1.60 Hz, 1H), 8.01 (d, J= 8.40 Etazeta,IotaEta), 7.75 (dd, J = 8.40, 2.40 Hz, 1H), 3.92 (s, 3H).

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 40473-01-6, 2-Bromo-5-chloropyridine.

Reference:
Patent; GLAXOSMITHKLINE LLC; QIN, Donghui; CHRISTENSEN, IV, Siegfried Benjamin; WU, Chengde; ZHANG, Zhiliu; YU, Haiyu; YUAN, Jiangxing; LIN, Xiaojuan; XU, Shanli; LV, Maoyun; YAO, Chen; LI, Lei; HUANG, Xing; GAO, Min; WO2013/166621; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem