Synthetic Route of 3430-21-5, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 3430-21-5, name is 5-Bromo-3-methylpyridin-2-amine. This compound has unique chemical properties. The synthetic route is as follows.
To dioxane (10 mL) was added 5-bromo-3-methylpyridin-2-amine (2 g, 10.6 mmol), sodium iodide (3.2 g, 21.4 mmoL), copper iodide (0.190 g, 1.06 mmol) and the solution degassed followed by addition of tetramethylethane-1,2-diamine (0.803 mL, 1.06 mmol) this mixture heated at 110 C. overnight. After cooling water was added and extracted the crude product with ethyl acetate. The residue was purified by column chromatography to give 5-iodo-3-methylpyridin-2-amine as a beige solid (2.3 g, 93%). Analogous to the procedure described in Ex. 40, 6-fluoro-7-(methylamino)-2,3-dihydrobenzo[e][1,3]oxazin-4-one (0.100 g, 0.51 mmol) and 5-iodo-3-methylpyridin-2-amine (0.119 g, 0.53 mmol) were coupled to yield pure 3-(6-aminopyridin-3-yl)-6-fluoro-7-(methylamino)-2,3-dihydrobenzo[e][1,3]oxazin-4-one (0.020 g, 13%) after reverse phase HPLC purification. ES-MS (M+H)+=303. Analogous to the sulfonylurea urea formation described in Ex 5, 3-(6-amino-5-methylpyridin-3-yl)-6-fluoro-7-(methylamino)-2,3-dihydrobenzo[e][1,3]oxazin-4-one (0.010 g, 0.034 mmol) and (5-Chloro-thiophene-2-sulfonyl)-carbamic acid ethyl ester (0.048 g, 0.166 mmol) were coupled to give 1-(5-chlorothiophen-2-ylsulfonyl)-3-(5-(6-fluoro-7-(methylamino)-4-oxo-2H-benzo[e][1,3]oxazin-3(4H)-yl)-3-methylpyridin-2-yl)urea (0.016 g, 85%). RP-HPLC: 2.7 min; ES-MS (M+H)+=526.0; 1H-NMR (DMSO-d6) delta (ppm): 2.2 (s, 3), 2.8 (s, 3), 5.6 (s, 2), 6.2 (d, 1), 6.8 (bs, 1), 7.2 (s, 1), 7.4 (d, 1), 7.6 (s, 1), 7.8 (d, 1), 8.2 (d, 1), 9.6 (bs, 1).
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 3430-21-5, 5-Bromo-3-methylpyridin-2-amine.
Reference:
Patent; Portola Pharmaceuticals, Inc.; US2006/69093; (2006); A1;,
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