Reference of 132195-42-7, 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 132195-42-7, name is 2,6-Dichloro-5-fluoro-4-methylnicotinic acid. This compound has unique chemical properties. The synthetic route is as follows.
A solution of EXAMPLE 1A (9.48 mmol) in dichloromethane (20 mL) was treated with oxalyl chloride (8 mL) and DMF (2 drops), stirred for 1 hour, and concentrated; and the concentrate was dissolved in THF (25 mL) to provide an acid chloride solution. A slurry of the mono-potassium salt of ethyl malonate (4.0 g) in acetonitrile (40 mL) at 0 C. was treated with triethylamine (3.3 mL) and magnesium chloride (3.2 g), warmed to ambient temperature, stirred for 4 hours, treated with the acid chloride solution, stirred for 1 hour, treated with 1M HCl, and extracted with ethyl acetate. The extract was washed with brine, dried (Na2SO4), filtered, and concentrated; and the concentrate was flash chromatographed on silica gel with 90:10 hexanes/ethyl acetate.
According to the analysis of related databases, 132195-42-7, the application of this compound in the production field has become more and more popular.
Reference:
Patent; Anderson, David; Beutel, Bruce; Bosse, Todd D.; Clark, Richard; Cooper, Curt; Dandliker, Peter; David, Caroline; Gu, Yu-Gui; Hansen, Todd Matthew; Hinman, Mira; Kalvin, Douglas; Larson, Daniel P.; Lynch, Linda; Ma, Zhenkun; Motter, Christopher; Palazzo, Fabio; Rosenberg, Teresa; Rehm, Tamara; Sanders, William; Tufano, Michael; Wagner, Rolf; Weitzberg, Moshe; Yong, Hong; Zhang, Tianyuan; US2003/232818; (2003); A1;,
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