Reference of 41864-45-3, These common heterocyclic compound, 41864-45-3, name is 4,5-Dimethoxy-2-methylaniline, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
The compound 63 (100 mg, 0.33 mmol) was dissolved in propionic acid (1 mL). 4,5-dimethoxy-2-methylaniline (223 mg, 1.33 mmol) was added to the solution. The mixture was stirred at 150C for 30 minutes. The reaction mixture was poured into ice water, and neutralized with the aqueous solution of sodium hydrogen carbonate. The mixture was extracted with ethyl acetate. The organic layer was washed by water and brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The obtained oil was purified by silica-gel column chromatography (hexane-ethyl acetate). The obtained residue was solidified with ethyl acetate-hexane to give the compound 5 (66 mg, yield 47%). 1H-NMR (CDCl3) delta: 1.91 (s, 3H), 2.20 (s, 3H), 3.81 (s, 3H), 3.85 (s, 3H), 5.24 (br s, 2H), 5.38 (s, 1H), 6.26 (s, 1H), 6.70 (s, 1H), 6.50-6.85 (m, 2H), 7.52 (br s, 1H).
Statistics shows that 4,5-Dimethoxy-2-methylaniline is playing an increasingly important role. we look forward to future research findings about 41864-45-3.
Reference:
Patent; Shionogi & Co., Ltd; TANAKA, Satoru; OGAWA, Tomoyuki; KAI, Hiroyuki; OGATA, Yuki; HIRAI, Keiichiro; KUROSE, Noriyuki; FUJII, Yasuhiko; (438 pag.)EP3287443; (2018); A1;,
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