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.3678-63-5, name is 4-Chloro-2-picoline, molecular formula is C6H6ClN, molecular weight is 127.57, as common compound, the synthetic route is as follows.name: 4-Chloro-2-picoline
Manufacturing Example 51-1-1 (4-Chloro-pyridin-2-yl)-methanol; To a mixture of 4-chloro-2-picoline (1.0 g, 7.84 mmol) and dichloromethane (20 mL), was added m-chloroperbenzoic acid (3.5 g, 13.2 mmol) on an ice bath, which was stirred for 1.5 hours at room temperature. Water and sodium hydrogencarbonate were added to the reaction, followed by extraction with dichloromethane. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. Acetic anhydride (20 mL) was added to the residue obtained by concentrating the filtrate under a reduced pressure, and this was stirred for 1 hour at 100 C. The reaction mixture was cooled to room temperature and concentrated under a reduced pressure. A 5 N aqueous sodium hydroxide solution (1.57 mL, 7.87 mmol) was added to a mixture of the resulting residue and methanol (20 mL) on an ice bath, which was stirred for 1.5 hours at room temperature. Water was added to the mixture, which was then extracted with ethyl acetate. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure and the residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=6:1) to obtain the title compound (200 mg, 18%).1H-NMR Spectrum (CDCl3) delta (ppm): 4.76 (2H, s), 7.23-7.25 (1H, m), 7.32-7.33 (1H, m), 8.46 (1H, d, J=5.6 Hz).
At the same time, in my other blogs, there are other synthetic methods of this type of compound,3678-63-5, 4-Chloro-2-picoline, and friends who are interested can also refer to it.
Reference:
Patent; Tanaka, Keigo; Yamamoto, Eiichi; Watanabe, Naoaki; US2009/82403; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem