Electric Literature of 98121-41-6, 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. 98121-41-6, name is 3-Amino-5,6-dichloropyridine, molecular formula is C5H4Cl2N2, 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.
To a solution of 5,6-dichloro-pyridin-3-ylamine (40.0 g, 0.245 mol, 1.0 equiv.) in dichloromethane (300 mL) at 0 C was added boron trifluoride diethyl etherate (42.0 g, 0.296 mol, 1.2 equiv.) followed by 2-methyl-2-nitrosooxy-propane (38.0 g, 0.369 mol, 1.5 equiv.). The resulting reaction was allowed to warm to 25 C. The slurry of the product was stirred at this temperature for 30-60 min and filtered to afford 5,6-dichloro-pyridine-3-diazonium tetrafluoroborate (51.0 g, 0.195 mol).5,6-Dichloro-pyridine-3-diazonium tetrafluoroborate (180 g, 0.688 mol, 1.0 equiv.) was dissolved in Ac2O (540 mL) and stirred at RT for a few minutes. Then, the mixture was heated to 60 C. Acetic acid 5,6-dichloro-pyridin-3-yl ester was detected by LCMS. The acetic acid was evaporated, the precipitate was diluted with DCM and evaporated in vacuo. The mixture was purified on silica gel (1% EtOAc in petroleum ether as eluent) to afford acetic acid 5,6-dichloro-pyridin-3-yl ester (84.0 g, 0.408 mol).
While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 98121-41-6, 3-Amino-5,6-dichloropyridine.
Reference:
Article; Duplessis, Martin; Morency, Louis; James, Clint; Minville, Joannie; Deroy, Patrick; Morin, Sebastien; Thavonekham, Bounkham; Tremblay, Martin; Halmos, Ted; Simoneau, Bruno; Bousquet, Yves; Sturino, Claudio; Tetrahedron Letters; vol. 54; 19; (2013); p. 2303 – 2307;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem