In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 178876-83-0, name is Methyl 6-amino-3-bromopicolinate, the common compound, a new synthetic route is introduced below. name: Methyl 6-amino-3-bromopicolinate
To a solution of 6-amino-3-bromo-pyridine-2-carboxylic acid methyl ester (3 g, 12.99 mmol) and trimethyl boroxine (1.8 mL, 2.99 mmol) in 1,4 dioxane (30 mL) was added K2CO3 (3.5 g, 25.97 mmol) under an argon atmosphere. To this was added PdCl2 (dppf) 2.CH2Cl2 (530 mg, 0.65 mmol) and stirred at 115C for 4 h. The reaction mixture was cooled to room temperature and water was added to residue. The aqueous phase was extracted with ethyl acetate, the combined organic phases were dried over sodium sulfate, the solvent was evaporated and the residue purified by silica gel chromatography using ethyl acetate/hexane as eluent. The title compound was obtained as an off white solid (1.9 g, 88%).MS ESI (m/e): 166.8 [(M+H)+].1H NMR (DMSO, 400 MHz): <5 (ppm) = 7.31(d, J= 8.4 Hz, 1H), 6.53 (d, J= 8.36 Hz, 1H), 5.99 (s, 2H), 3.77 ( s, 3H), 2.21 (s, 3H).
The synthetic route of 178876-83-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; F. HOFFMANN-LA ROCHE AG; BAUMANN, Karlheinz; GOETSCHI, Erwin; GREEN, Luke; JOLIDON, Synese; KNUST, Henner; LIMBERG, Anja; LUEBBERS, Thomas; THOMAS, Andrew; WO2011/92272; (2011); A1;,
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