Application of 239087-12-8, These common heterocyclic compound, 239087-12-8, name is 3-Fluoro-5-(trifluoromethyl)phenylacetonitrile, 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 S55; Preparation of 2-(3-fluoro-5-trifluoromethyl-phenyl)-ethylamine hydrochloride; 5.45 g of (3-fluoro-5-trifluoromethyl-phenyl)-acetonitrile (26.3 mmol) were dissolved in 45 ml THF and cooled down to 0 C. under nitrogen. 138 ml of a 1M borane-THF complex solution in THF (138 mmol) were then added dropwise over 20 min by keeping the temperature between 0-2 C. After addition the reaction mixture was stirred at rt for additional 45 min, and refluxed for 17 h. The reaction mixture was then cooled down to 0 C. and treated between 2 and 5 C. with 33 ml methanol over a period of 45 min. After 1 h refluxing the reaction mixture was concentrated, the residue dissolved in DCM and the amine extracted twice with 1N aqueous HCl. The combined aqueous phases are then treated with concentrated NaOH to adjust the pH to 12, and then extracted twice with DCM. The combined organic phases were then washed with water, dried over magnesium sulfate, filtered and concentrated in vacuo leading to 4.44 g colorless oil. This was dissolved in 100 ml diethylether, treated with 9 ml 2.6N HCl in diethylether, stirred at rt for additional 30 min, filtered and dried under high vacuo, leading to 4.6 g white solid (72%). MS (ISP) 207.1 (M+H)+.
Statistics shows that 3-Fluoro-5-(trifluoromethyl)phenylacetonitrile is playing an increasingly important role. we look forward to future research findings about 239087-12-8.
Reference:
Patent; Conte-Mayweg, Aurelia; Kuehne, Holger; Luebbers, Thomas; Maugeais, Cyrille; Mueller, Werner; Pflieger, Philippe; US2006/30613; (2006); A1;,
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