已经开发了使用ZnO @ Fe 3 O 4合成异恶唑5(4 H)-one衍生物的有效且环保的方法核-壳纳米催化系统。芳族/杂环醛,盐酸羟胺和乙酰乙酸乙酯的单锅多组分反应在水性条件下在略微升高的温度下以极高的收率形成标题化合物。当前的新方案对环境友好,因为它提供了一些有趣的有前途的功能,如安全性,原子效率,低成本,温和的条件,废物最少,催化剂可回收性,水为溶剂,易于加工并具有出色的官能团耐受性结构上不同的异恶唑衍生物的合成。所有产品均通过光谱和分析方法表征。用单晶X射线衍射法研究了代表性的标题衍生物的结构。
Expeditious green synthesis of 3,4-disubstituted isoxazole-5(4H)-ones catalyzed by nano-MgO
作者:Hamzeh Kiyani、Fatemeh Ghorbani
DOI:10.1007/s11164-016-2498-7
日期:2016.9
three-component reaction of hydroxylaminehydrochloride with aryl aldehydes (or heteroaryl aldehydes) and β-oxoesters to synthesize some biologically active isoxazole-5(4H)-one-based heterocycles. The reactions were completed using 3 mol% catalyst loading in aqueous medium at room temperature. Nano-MgO was synthesized by precipitation and hydrothermal treatment of aqueous salt solution. The structure of the
Facile and expedient synthesis of α,β-unsaturated isoxazol-5(4H)-ones under mild conditions
作者:Fatemeh Ghorbani、Hamzeh Kiyani、Seied Ali Pourmousavi
DOI:10.1007/s11164-019-03999-7
日期:2020.1
three-component cyclocondensation of aryl/heteroaryl aldehydes, hydroxylamine hydrochloride, and β -ketoesters toward the synthesis of α , β -unsaturated isoxazol-5(4 H )-ones under green conditions. The reaction yielded the corresponding heterocycles at room temperature in relatively shorter reaction times. It merits mentioning that the mild conditions allow the synthesis of several α , β -unsaturated isoxazol-5(4
摘要 发现芳基/杂芳基醛,羟胺盐酸盐和 β- 酮酸酯的三组分环缩合反应可催化 纳米SiO 2 -H 2 SO 4合成 α , β- 不饱和异恶唑-5(4 H )-在绿色条件下。该反应在室温下以相对较短的反应时间产生相应的杂环。值得一提的是,温和的条件允许合成几种 α , β- 不饱和异恶唑-5(4 H )-使用此方法的人。在这项研究中,还合成并表征了一些新的异恶唑酮衍生物。它高效,清洁,简单,安全且生态友好。这种简单的方法具有成本效益,并且不需要制备反应物。在不使用能量源(例如热,超声波和微波辐射)的情况下进行三组分环化。 图形摘要
An efficient route for the synthesis of a new class of pyrido[2,3-d]pyrimidine derivatives
A new reaction of 4-arylidene-3-methylisoxazol-5(4H)-one or 4-arylidene-2-phenyloxazol-5(4H)-one with 2,6-diaminopyrimidin-4(3H)-one is described and a number of new pyrido[2,3-d]pyrimidine-4,7-dione derivatives are synthesized. This protocol has the advantages of good yields, broad substrate scope and simple work-up.
Synthesis of 3-methyl-4-arylmethylene isoxazole-5(4H)-ones by visible light in aqueous ethanol
作者:Forid Saikh、Jhantu Das、Somnath Ghosh
DOI:10.1016/j.tetlet.2013.06.086
日期:2013.8
A highly efficient methodology for the synthesis of 3-methyl-4-arylmethylene-isoxazole-5(4H)-ones has been developed by visible light induced multicomponent reaction of aromatic aldehydes, ethyl acetoacetate, hydroxylamine hydrochloride, and sodium acetate in aqueous ethanol sans any phase transfer catalyst or promoter.
Developing a cost effective and environmentally benign solvent system is of the utmost importance in the chemical industry. One current proposal is the replacement of conventional hazardous volatil...