Electric Literature of 179897-89-3, A common heterocyclic compound, 179897-89-3, name is 5-Bromo-2-fluorobenzonitrile, molecular formula is C7H3BrFN, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
To a solution of zinc chloride (50 mL, 1.0 M in diethyl ether, 50 mmol) was added neopentylmagnesium chloride (50 mL, 1.0 M in THF, 50 mmol) dropwise at 0 C. During the addition, the generated magnesium salts formed a white precipitate. The reaction was removed from the ice bath and allowed to stir for 1 h then 1-bromo-2-fluorobenzonitrile (5 g, 25 mmol) was added followed by bis (tri-tert- butylphosphine) palladium (0.127 g, 0.25 mmol, 1%). The reaction began to reflux and was placed back into the ice bath. After 1 h, the reaction was diluted with 200 mL of diethyl ether and washed with 1 N HCI (2 x 100 mL), brine (100 mL), dried over magnesium sulfate and concentrated to give an oily solid (4.3 g, 22 mmol, 90%).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; ELAN PHARMACEUTICALS, INC.; WO2005/70407; (2005); A1;,
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts