Reference of 6635-90-1, 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 6635-90-1, name is 2-Methoxy-4-methyl-5-nitropyridine. This compound has unique chemical properties. The synthetic route is as follows.
A solution of 2-methoxy-4-methyl-5-nitropyridine (4.30 g, 25.57 mmol) and dimethylformamide dimethylacetal (35 ml) was heated at reflux under nitrogen for 40 hours. Ethyl acetate was added to this solution (150 ml), and this mixture was washed with water (150 ml). The aqueous extract was back-extracted with ethyl acetate (100 ml), and the organic extracts were combined, dried (Na2 O4), and evaporated under reduced pressure to yield a purple solid. The solid was dissolved in absolute ethanol (200 ml), and 5% palladium on carbon (3.0 g) was added to this solution which was shaken under a hydrogen atmosphere (3 atm) for 3 hours. The resultant reaction mixture was filtered, and the filtrate was evaporated under reduced pressure. Flash chromatography of the residue yielded compound 9 (2.05 g, 13.84 mmol, 54% last step, 50% overall) as a white crystalline solid: mp, 123-124 C.; IR (KBr) 1625, 1580, 1490, 1460, 1320, 1150 cm-1; 1 H NMR (DMSO-d6) delta 11.28 (br s, 1H), 8.37 (s, 1H), 7.57 (t, J=2.8 Hz, 1H), 6.86 (s, 1H), 6.33 (br m, 1H), 3.82 (s, 3H); 13 C NMR (DMSO-d6) delta 157.2, 136.4, 131.5, 130.7, 130.0, 99.6, 96.8, 53.4; LRMS (m/z, relative intensity) 149 (20), 148 (M+, 98), 147 (100), 119 (46), 118 (79), 117 (26), 105 (31), 91 (15), 70 (16); HRMS calculated for C8 H8 N2 O:148.0657, found: 148.0613.
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 6635-90-1, 2-Methoxy-4-methyl-5-nitropyridine.
Reference:
Patent; Pfizer Inc.; US5051412; (1991); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem