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.1211518-35-2, name is Methyl 6-chloro-5-(trifluoromethyl)picolinate, molecular formula is C8H5ClF3NO2, molecular weight is 239.58, as common compound, the synthetic route is as follows.Formula: C8H5ClF3NO2
Sodium hydride (1.1 g, 31.4 mmol) was added in portions to cyclopropylmethanol (20 mL) and the mixture was stirred at room temperature for 0.5 hours. 6-Chloro-5-(trifluoromethyl)-pyridine-2-carboxylic acid methyl ester (1.5 g, 6.3 mmol) was added and the resulting solution was stirred at 80 C. for 1 h. Water (20 mL) was added; the solution was acidified with 6 N hydrochloric acid and then concentrated to give a residue which was partitioned between water (30 mL) and ethyl acetate (20 mL). The aqueous solution was extracted with ethyl acetate (2×20 mL) and the combined organic phase was washed with brine (20 mL), dried over anhydrous sodium sulfate, filtered and concentrated to give the crude target compound. The crude target compound was purified by column chromatography (silica gel, 10 g, 15% ethyl acetate in petroleum ether) to give the title compound (1.4 g, 85%) as white solid; MS (EI): m/e=262.0 [M+H]+.
At the same time, in my other blogs, there are other synthetic methods of this type of compound,1211518-35-2, Methyl 6-chloro-5-(trifluoromethyl)picolinate, and friends who are interested can also refer to it.
Reference:
Patent; Bissantz, Caterina; Grether, Uwe; Hebeisen, Paul; Kimbara, Atsushi; Liu, Qingping; Nettekoven, Matthias; Prunotto, Marco; Roever, Stephan; Rogers-Evans, Mark; Schulz-Gasch, Tanja; Ullmer, Christoph; Wang, Zhiwei; Yang, Wulun; US2012/316147; (2012); A1;,
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