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. 856013-04-2, name is 6-Bromopyridine-2-sulfonamide, molecular formula is C5H5BrN2O2S, 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. COA of Formula: C5H5BrN2O2S
Under argon, 3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]pyridine (0.2 g, 0.74 mmol, prepared by the methods described in WO 2011/045224), 6-bromopyridin-2-sulphonamide (0.175 g, 0.74 mmol) and tetrakis(triphenylphosphine)palladium (0.025 g, 0.022 mmol) were added to a mixture, degassed by means of argon, of sodium carbonate solution in water (2.9 ml, 2 M/L) and acetonitrile (4 ml). The reaction mixture was stirred at 70 C. for 18 h. After cooling, the reaction mixture was poured onto water and the precipitated crystals were filtered off with suction. They were subsequently stirred with diethyl ether and filtered off with suction. This gave 0.23 g (97% of theory) of 6-[1-(pyridin-3-yl)-1H-pyrazol-4-yl]pyridine-2-sulphonamide.HPLC-MS: LogP(HCOOH): 0.99; mass (m/z): 302.1 (M+H)+ 1H NMR (d6-DMSO): 7.43 (s, 2H), 7.60-7.63 (m, 1H), 7.76 (d, 1H), 8.00 (d, 1H), 8.11 (t, 1H), 8.28-8.31 (m, 1H), 8.53 (s, 1H), 8.58-8.60 (m, 1H), 9.16-9.17 (m, 1H), 9.33 (s, 1H) ppm
With the rapid development of chemical substances, we look forward to future research findings about 856013-04-2.
Reference:
Patent; BAYER CROPSCIENCE AG; US2012/165345; (2012); A1;,
Pyridine – Wikipedia,
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