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.33252-28-7, name is 6-Chloronicotinonitrile, molecular formula is C6H3ClN2, molecular weight is 138.55, as common compound, the synthetic route is as follows.COA of Formula: C6H3ClN2
Example 15-Cyano-pyridine-2-carboxylic acid A 2 L stirred autoclave was charged under argon with PdC12(dppp) (2.13 g, 3.61 mmol), 6- chloro-nicotinonitrile (100 g, 0.722 mol), tert-butanol (800 ml), deionized water (200 ml) andtriethylamine (250 ml, 1.8 mol). The reaction vessel was closed, purged three times with carbonmonoxide (10 bar) and finally charged with carbon monoxide to 15 bar. The mixture was stirredvigorously at 60C under constant pressure for 10 h; after this time no more carbon monoxideabsorption was observed. The reaction mixture was concentrated on a rotary evaporator such thatthe volatile organic components were removed. The resulting aqueous phase was filtered,extracted with dichloromethane and treated with active charcoal. After filtration, the pH of thesolution was reduced under stuffing at 60C to ca. 0.7 by dropwise addition of hydrochloric acid.The resulting suspension was stirred at room temperature over night and then filtered. The filter cake was rinsed with water and dried in vacuo to constant weight to afford 5-cyano-pyridine-2- carboxylic acid (98.95 g) as a white solid, MS: mlz = 104 [M-C021, m.p.: 207 C (dcc).
At the same time, in my other blogs, there are other synthetic methods of this type of compound,33252-28-7, 6-Chloronicotinonitrile, and friends who are interested can also refer to it.
Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; FETTES, Alec; MARTY, Hans-Peter; SCALONE, Michelangelo; WO2014/173917; (2014); A1;,
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