Electric Literature of 1897-52-5, A common heterocyclic compound, 1897-52-5, name is 2,6-Difluorobenzonitrile, molecular formula is C7H3F2N, 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.
Example 156A 2-Fluoro-6-(1H-1,2,4-triazol-1-yl)benzonitrile Under argon, 2,6-difluorobenzonitrile (1.00 g, 7.19 mmol) was dissolved in dimethylsulfoxide (4 mL), and 1,2,4-triazole (0.52 g, 7.48 mmol) and cesium carbonate (2.44 g, 7.48 mmol) were added. The mixture was stirred at 50 C. for 5 h. After cooling to RT, water (20 mL) was added and stirring was continued for 15 min. The precipitate was filtered and washed with water (10 mL). The solid was taken up in dichloromethane/water and extracted with dichloromethane. The combined organic phases were washed with brine, and concentrated in vacuo. Purification via column chromatography (silica gel, cyclohexane/ethyl acetate, Gradient) afforded the title compound (0.25 g, 18% of theory). LC-MS (Method 1B): Rt=0.62 min, MS (ESIPos): m/z=189 [M+H]+
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; BAYER PHARMA AKTIENGESELLSCHAFT; Hassfeld, Jorma; KINZEL, Tom; Koebberling, Johannes; CANCHO GRANDE, Yolanda; BEYER, Kristin; Roehrig, Susanne; Koellnberger, Maria; SPERZEL, Michael; BURKHARDT, Nils; SCHLEMMER, Karl-Heinz; STEGMANN, Christian; SCHUHMACHER, Joachim; WERNER, Matthias; ELLERMANN, Manuel; US2015/126449; (2015); A1;,
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