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.117519-09-2, name is 3-Amino-2-chloro-6-(trifluoromethyl)pyridine, molecular formula is C6H4ClF3N2, molecular weight is 196.56, as common compound, the synthetic route is as follows.Application In Synthesis of 3-Amino-2-chloro-6-(trifluoromethyl)pyridine
A solution of 3-amino-2-chloro-6-trifluoromethyl-pyridine (0.890 g), 4-(4,4,5,5-tetramethyl-[l,3,2]dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-l-carboxylic acid tert-butyl ester (1.4 g) (prepared as described in WO 2006/003494) and tetrakis(triphenyl- phosphine)palladium (0.200 g) in 1 ,2-dimethoxyethane (45 ml) was treated with aqueous potassium phosphate (1.1 M) (1.92 g). The reaction mixture was stirred at 800C for 3 hours. Aqueous workup with ethyl acetate furnished a residue which was purified by chromatography on silica gel (eluent: hexane / ethyl acetate 1 :1) to give 3-amino-6- trifluoromethyl-3′,6′-dihydro-2’H-[2,4′]bipyridinyl-r-carboxylic acid tert-butyl ester (1.5 g) as a white solid. MS (ES+) 288 (M-isoprene); IH NMR (400 MHz, CDCl3) 1.50 (s, 9H), 2.61 (m, 2H), 3.67 (t, 2H), 4.10 (m, 2H), 4.21 (s, 2H), 6.11 (s, IH), 7.03 (d, IH), 7.33 (d, IH).
At the same time, in my other blogs, there are other synthetic methods of this type of compound,117519-09-2, 3-Amino-2-chloro-6-(trifluoromethyl)pyridine, and friends who are interested can also refer to it.
Reference:
Patent; SYNGENTA PARTICIPATIONS AG; PITTERNA, Thomas; CASSAYRE, Jerome Yves; CORSI, Camilla; MAIENFISCH, Peter; WO2010/9968; (2010); A1;,
Pyridine – Wikipedia,
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