With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.65202-50-8,Methyl 6-chloropyridazine-3-carboxylate,as a common compound, the synthetic route is as follows.,65202-50-8
A solution of THF (2.5 mL) and toluene (10 mL), and methylmagnesiurn chloride (3.0 M, 9.7 mL) were stirred at -2O0C under N2 atmosphere followed by the addition of f-BuOH (0.5 mL, 5.79 mrnol) in THF (7 mL) dropwise. The solution was allowed to stir for 30 min and warmed to 30C and cooled backed down to -200C followed by the addition of the methyl 6- chloropyridazine-3-carboxylate (1.0 g, 5.79 mmol) in portions. The solution quickly turned dark violet and was stirred at 00C for 30 min. The solution was then poured into a flask containing 1 N aqueous hydrochloric acid at -50C, diluted with ethyl acetate, and stirred for 10 min. The layers were then separated and the organic layer was washed with saturated aqueous sodium bicarbonate and brine. The acidic aqueous layer was neutralized with saturated aqueous sodium bicarbonate and extracted with ethyl acetate. The organic layers were combined and concentrated in vacuo. Purification via flash chromatography (silica, 0-100percent ethyl acetate/hexanes) provided the title compound. LRMS (ESI) calc’d for C7H10ClN2O [M+H]+: 173.1, Found: 173.1
As the paragraph descriping shows that 65202-50-8 is playing an increasingly important role.
Reference£º
Patent; MERCK & CO., INC.; MACHACEK, Michelle, R.; HAIDLE, Andrew; ZABIEREK, Anna, A.; KONRAD, Kaleen, M.; ALTMAN, Michael, D.; WO2010/11375; (2010); A2;,
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