With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.5788-58-9,4,5-Dibromopyridazin-3(2H)-one,as a common compound, the synthetic route is as follows.,5788-58-9
General procedure: To a solution of 4,5-dichloro-2,3-dihydropyridazin-3-one (65.6 mg, 0.40 mmol, 1 equiv.) in DMA(2 mL) were added 1-[(2,4-difluorophenyl)methyl]piperazin-2-one (90 mg, 0.40 mmol, 1 equiv.) and DIEA(102.8 mg, 0.80 mmol, 2 equiv.) at room temperation. The resulting mixture was stirred for 16 h at 100 degrees C. The reaction was monitored by LCMS. The product was purified by reverse phase flash with the following conditions (Column: spherical C18, 20-40 um,120g; Mobile Phase A: Water(5mmol/L NH4HCO3), Mobile Phase B: MeCN; Flow rate:45mL/min; Gradient: 20% B to 40% B in 25min; 220 nm) to afford 4-chloro-5-[4-[(2,4- difluorophenyl)methyl]-3-oxopiperazin-1-yl]-2,3-dihydropyridazin-3-one (28.6 mg, 20.27%) as a yellow solid
As the paragraph descriping shows that 5788-58-9 is playing an increasingly important role.
Reference£º
Patent; GOLDFINCH BIO, INC.; YU, Maolin; DANIELS, Matthew, H.; HARMANGE, Jean-christophe, P.; TIBBITTS, Thomas, T.; LEDEBOER, Mark, W.; WALSH, Liron; MUNDEL, Peter, H.; MALOJCIC, Goran; (860 pag.)WO2019/55966; (2019); A2;,
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