A common heterocyclic compound, 13671-00-6, name is Methyl 2,6-difluorobenzoate, molecular formula is C8H6F2O2, 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. 13671-00-6.
Step 3: methyl 2,6-difluoro-3-nitrobenzoateTo a solution of methyl 2,6-difluorobenzoate (68.8 g, 0.4 mol) in con. H2SO4 (300 mL) was added potassium nitroperoxous acid (48.5 g, 0.48 mol) for three times and the resulting reaction mixture was stirred at room temperature for 2 hrs. The mixture was droped into ice-water (500 mL) and filtered. The solid was washed with water and dried to afford the desired product (89 g, 100%).1H NMR (DMSC i): ? 8.49-8.43 (1H, m), 7.56-7.51 (1H, m), 3.95 (3H, s).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 2,6-difluorobenzoate, its application will become more common.
Reference:
Patent; CENTAURUS BIOPHARMA CO., LTD.; XIAO, Dengming; LI, Jijun; ZHU, Yan; HU, Yuandong; WANG, Huting; WANG, Zhe; WANG, Zanping; WEI, Yongheng; SUN, Yinghui; WU, Qiong; ZHANG, Hui; PENG, Yong; KONG, Fansheng; SUN, Ying; LUO, Hong; HAN, Yongxin; WO2013/71865; (2013); A1;,
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