Application of 160911-11-5, These common heterocyclic compound, 160911-11-5, name is 1-Fluoro-3-methoxy-5-methylbenzene, 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.
(40b) 1-Fluoro-5-methylphenol A solution of 1-fluoro-3-methoxy-5-methylbenzene obtained in Example (40a) (0.92 g, 6.56 mmol) and boron tribromide (1.0 M solution in methylene chloride, 8.53 mL, 8.53 mmol) in methylene chloride (20 mL) was stirred at 0C for 10 hours. Water (100 mL) was added to the reaction solution, followed by extraction with methylene chloride (100 mL). Then, the organic layer was dried over anhydrous sodium sulfate. After concentration under reduced pressure, the residue was purified by silica gel chromatography (hexane:ethyl acetate, 1:1) to obtain the title compound (0.83 g, yield: 99%) as a yellow oil. 1H-NMR (CDCl3, 400 MHz) delta: 2.06 (3H, s), 4.97 (1H, s), 6.37 (1H, dt, J = 2.4, 10.2 Hz), 6.44 (1H, s), 6.48 (1H, d, J = 8.6 Hz).
The synthetic route of 160911-11-5 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Daiichi Sankyo Company, Limited; EP2138484; (2009); A1;,
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