Application of 113170-72-2, A common heterocyclic compound, 113170-72-2, name is 3-Bromo-5-(trifluoromethyl)benzene-1,2-diamine, molecular formula is C7H6BrF3N2, 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.
Intermediate 8 : 7-brom -2-(6-fluoropyridin-3 -yl)-5 -(trifluoromethyl)- 1 H-benzimidazole To a mixture of 6-fluoronicotinaldehyde (2.5 g, 19.98 mmol), 3-bromo-5-(trifluoromethyl)benzene-l,2-diamine (4.84 g, 19.98 mmol) in DMF (40 ml) and water (4 ml) added potassium peroxymonosulfate (7.99 g, 12.99 mmol) in portions over 1 hour. The reaction mixture was stirred overnight under N2 then pour into water (50 ml), extract with 3×80 ml ethyl acetate. The organic layers were combined, washed with 2×25 ml of saturated brine, dried over anhydrous sodium sulfate and concentrated under vacuum. Part of the product was crystallized from dichloromethane. The mother liquor was purified by reverse phase HPLC to afford 7- bromo-2-(6-fluoropyridin-3-yl)-5 -(trifluoromethyl)- 1 H-benzimidazole as brown solid. LC-MS (ES, m/z) Ci3H6BrF4N3 : 361; Found: 362 [M+H]+.
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; INTERVET INTERNATIONAL B.V.; DE VITA, Robert, J.; HONG, QingMei; LAI, Zhong; DYKSTRA, Kevin, D.; YU, Yang; LIU, Jian; SPERBECK, Donald; JIAN, Tianying; GUIADEEN, Deodial; XU-QIANG YANG, Ginger; WU, Zhicai; HE, Shuwen; TING, Pauline, C.; ASLANIAN, Robert; KUETHE, Jeffrey, T.; BALKOVEC, James, M.; KUANG, Rongze; ZHOU, Gang; WU, Heping; WO2012/164071; (2012); A1;,
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