in 1,4-dioxane is reported for the synthesis of biologically interesting benzoxazin-3(4H)-ones. It is believed that irradiation with a blue LED facilitates the reaction, serving as a source of energy. The SEAr reaction pathway is ascribed to the electronic effects present in the aryl ring of the substrates. The reaction is also applicable for the synthesis of useful scaffolds possessing a quinolin-2-one
据报道,在 1,4-二恶烷中使用 FeCl3 对 N-酰氧基酰胺进行光诱导分子内亲电芳香取代 (SEAr),用于合成具有生物学意义的苯并恶嗪-3(4H)-酮。据信,蓝色 LED 的照射会促进反应,从而充当能量来源。SEAr 反应途径归因于底物芳环中存在的电子效应。该反应还适用于合成具有喹啉-2-一核心的有用支架,例如抗癌试剂以及布西哌唑和西洛酰胺的类似物。
The synthesis and evaluation of phenoxyacylhydroxamic acids as potential agents for Helicobacter pylori infections
Two series of omega-phenoxy contained acylhydroxamic acids as novel urease inhibitors were designed and synthesized. Biological activity evaluations revealed that co-phenoxypropinoylhydroxamic acids were more active than phenoxyacetohydroxamic acids. Out of these compounds, 3-(3,4-dichlorophenoxy)propionylhydroxamic acid c24 showed significant potency against urease in both cell free extract (IC50 = 0.061 +/- 0.003 mu M) and intact cell (IC50 = 0.89 +/- 0.05 mu M), being over 450- and 120-fold more potent than the clinically prescribed urease inhibitor AHA, repectively. Non-linear fitting of experimental data (V-[S]) suggested a mixed-type inhibition mechanism and a dual site binding mode of these compounds.
Eckstein; Urbanski, Bulletin de l'Academie Polonaise des Sciences, Serie des Sciences Chimiques, 1956, vol. <III> 4, p. 627,628