Synthetic Route of 58584-86-4 ,Some common heterocyclic compound, 58584-86-4, molecular formula is C8H7Cl2NO2, 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 first step of Scheme 5: A dry round bottom flask was charged with NaH (264 mg of a 60% dispersion in mineral oil, 6.6 mmole) and the reagent washed twice with hexane. 5 mL dry DMF was added and benzyl alcohol (0.62 mL, 6.0 mmole) was added dropwise. After H2 evolution had ceased the reaction mixture was added dropwise to a 0 C. solution (10 mL) of 2,6-dichloro-nicotinic acid ethyl ester (1.33 g, 6.0 mmole). It was stirred 15 minutes, and then allowed to stir another 20 minutes at room temperature. The reaction mixture was then poured into 150 mL water and extracted with ether (3×75 mL). Combined organic phases were washed with water, brine and dried over MgSO4. Filtration and evaporation gave the crude product which was then purified by chromatography on silica gel using a gradient of hexane/EtOAc (0 to 4%) as eluent. Pure fractions were combined and evaporated to give 818 mg (47%) of a 1:1 mixture of 2-benzyloxy-6-chloro-nicotinic acid ethyl ester and 6-benzyloxy-2-chloro-nicotinic acid ethyl ester.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,58584-86-4, its application will become more common.
Reference:
Patent; Lee, Jinbo; Kirincich, Steve J.; Smith, Michael J.; Wilson, Douglas P.; Follows, Bruce C.; Wan, Zhao-Kui; Joseph-McCarthy, Diane M.; Erbe, David V.; Zhang, Yan-Ling; Xu, Weixin; Tam, Steve Y.; US2005/203081; (2005); A1;,
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