Reference of 2369-19-9, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 2369-19-9, name is 2-Fluoro-5-methylpyridine, molecular formula is C6H6FN, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.
Intermediate 8:2-fluoro-5-methylnicotinic acid[00363] A 1.6M solution of butyl lithium in hexanes (28.13 ml, 45 mmol) was added dropwise to a solution of diisopropylamine (6.36 ml, 45 mmol) in tetrahydrofuran (80 ml) keeping the temperature at -78C. After complete addition, the mixture was allowed to warm up to 0C, then stirred at 0C for 10 minutes. The resulting mixture was cooled down to -78C and a solution of 2-fluoro-5-methylpyridine (4.64 ml, 45 mmol) in tetrahydrofuran (15 ml) was added dropwise. The reaction mixture was stirred at -78C for 2 hours then quenched by addition of an excess of CO2 solid. The mixture was allowed to warm up to room temperature. The mixture was acidified with 10% citric acid, diluted with ethyl acetate. The organic layer was collected, washed further with brine, dried over magnesium sulfate, filtered and concentrated in vacuo to leave the desired compound as a white solid (4.9 g, 70% yield).[00364 ] 1H NMR (DMSO-d6, 400 MHz) delta 2.34 (3H, s), 8.20-8.26 (2H, m); MS (ES+) 156, (ES”) 154.
According to the analysis of related databases, 2369-19-9, the application of this compound in the production field has become more and more popular.
Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2008/94992; (2008); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem