With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.628691-93-0, name is 2-Chloro-3-fluoroisonicotinic acid, molecular formula is C6H3ClFNO2, molecular weight is 175.55, as common compound, the synthetic route is as follows.Product Details of 628691-93-0
Step l :A suspension of 2-chloro-3-fluoropyridine-4-carboxylic acid (CAS 628691-93-0, 2 g, 11.39 mmol) in MeOH (7 mL) and DCM (21 mL) at 0 C was treated with TMS-Diazomethane (5.70 mL, 11.39 mmol) in a drop wise fashion. The reaction was stirred at 0 C for 0.5 h. The reaction was quenched with AcOH (0.5 mL) and concentrated in vacuo. The residue was purified by flash chromatography (0-100% EtOAc in petrol on Si02) to afford methyl 2-chloro-3-fluoropyridine-4-carboxylate. 1H NMR (300 MHz, Methanol-^) delta ppm 3.97 (s, 3 H) 7.76 – 7.86 (m, 1 H) 8.29 – 8.40 (m, 1 H)
At the same time, in my other blogs, there are other synthetic methods of this type of compound,628691-93-0, 2-Chloro-3-fluoroisonicotinic acid, and friends who are interested can also refer to it.
Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; AHMED, Saleh; BARKER, Gregory; CANNING, Hannah; DAVENPORT, Richard; HARRISON, David; JENKINS, Kerry; LIVERMORE, David; WRIGHT, Susanne; KINSELLA, Natasha; (259 pag.)WO2016/148306; (2016); A1;,
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