在碱性条件下,在干燥的CH 3 CN中,研究了一些N-芳基甲酰胺衍生的烯醇-亚胺与五氯吡啶的位点反应性。五氯吡啶被烯醇-亚胺的芳香亲核取代发生在吡啶环的4位,同时被烯醇-亚胺的氧和氮位置所取代。烯醇-亚胺氧的亲核攻击产生了相应的肟基化合物,这些化合物是E-和Z-异构体的混合物。相反,烯醇-亚胺氮的亲核攻击产生了意想不到的N,N-二取代芳基化合物。所有化合物的结构通过IR,1 H NMR,13 C NMR和19 F NMR光谱以及元素分析和X射线晶体学。
Polyhalogenoaromatic compounds. Part 43. Inter- and intra-molecular reactions of polychloroaromatic compounds with copper
作者:Arthur G. Mack、Hans Suschitzky、Basil J. Wakefield
DOI:10.1039/p19800001682
日期:——
The reaction of polychloroiodoarenes with copper in dimethylformamide gives good yields of the biaryls. 4Bromotetrachloropyridine gives products of halogen exchange and reduction as well as coupling. Pentachloropyridine gave only tetrachloropyridines. Evidence against free radical or pyridyne intermediates is presented, and it is postulated that the reactions proceed via pyridylcopper compounds, although