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.14432-12-3, name is 4-Amino-2-chloropyridine, molecular formula is C5H5ClN2, molecular weight is 128.56, as common compound, the synthetic route is as follows.Computed Properties of C5H5ClN2
N-iodosuccinimide (15.75 g, 70 mmol) was added to a solution of 2-chloropyridin-4-amine (9.00 g, 70 mmol) in N,N’-dimethylformamide (140 mL) and the mixture was stirred at 80 C for 6 hours. Further N-iodosuccinimide (7.80 g, 35 mmol) was added and the mixture was stirred at 60 C overnight. After cooling to room temperature, the solvent was evaporated under reduced pressure and the residue was partitioned between water and ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium thiosulphate, water and brine, dried (MgSO4) and concentrated. The residue was purified by flash chromatography (6:1 to 2:1 hexanes/ethyl acetate) to yield the title compound (6.80 g, 38%) as a beige solid. LRMS (m/z): 255 (M+1)+. 1H-NMR delta (CDCl3): 4.77 (brs, 2H), 6.63 (s, 1H), 8.34 (s, 1H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound,14432-12-3, 4-Amino-2-chloropyridine, and friends who are interested can also refer to it.
Reference:
Patent; Laboratorios Almirall, S.A.; EP2108641; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem