Fast and Efficient Synthesis of 4-Arylidene-3-phenylisoxazol-5-ones
作者:Maryam Mirzazadeh、Gholam Hossein Mahdavinia
DOI:10.1155/2012/562138
日期:——
A convenient and easy synthesis of 4-arylidene-3-phenylisoxazol-5-ones by the three-component reaction of hydroxylamine, ethyl benzoylacetate and aromatic aldehydes in the presence of DABCO in refluxing ethanol is reported.
Urea-catalyzed multicomponent synthesis of 4-arylideneisoxazol-5(4H)-one derivatives under green conditions
作者:Faezeh Haydari、Hamzeh Kiyani
DOI:10.1007/s11164-022-04907-2
日期:2023.3
A simple and green one-pot, three-component procedure was used for the efficient synthesis of different isoxazol-5(4H)-ones from aryl/heteroaryl aldehydes, hydroxylamine hydrochloride, and β-keto esters in environment-friendly water solvent containing a catalytic amount of urea. Employing urea as the commercially available and cost-efficient natural organo-catalyst provides an easy access to a large
一种简单、绿色的一锅法、三组分程序用于在环境友好的水溶剂中高效合成不同的异恶唑-5(4 H )-芳基/杂芳基醛、盐酸羟胺和β-酮酯。催化量的尿素。使用尿素作为市售且具有成本效益的天然有机催化剂,可以轻松获得大量 3, 4-二取代异恶唑-5(4 H)-一个衍生物。当给电子基团存在于取代苯甲醛的苯环上时,反应进行得很好,而当苯环上存在电子接受基团时,只能得到少量的杂环产物。此外,反应发生在水作为一种有效且环境友好的溶剂中,这从绿色化学的角度来看很重要。目前的工作还有几个好处,如避免繁琐的后处理程序、不需要特殊的实验装置、更高的效率、可重复使用性和催化剂的可回收性。
Rapid synthesis of fully substituted arylideneisoxazol-5(4H)-one using zinc oxide nanoparticles
作者:Shiva Aslanpour、Hamzeh Kiyani
DOI:10.1007/s11164-023-05059-7
日期:2023.10
highly substituted arylideneisoxazol-5-(4H)-one products. A wide scope of the heterocyclic products was obtained via the three-component cyclocondensation of various aryl aldehydes, NH2OH·HCl, and β-dicarbonyls by zinc oxide nanoparticles (ZnO NPs) as the catalyst. Optimizing the reaction conditions indicated that a relatively small amount of catalyst was required and arylideneisoxazol-5-(4H)-ones were
引入了一种简单、快速、绿色、高效的合成程序,可以轻松获得合成的高度取代的亚芳基异恶唑-5-(4 H )-酮产品。以纳米氧化锌(ZnO NPs)为催化剂,通过各种芳基醛、NH 2 OH·HCl和β-二羰基化合物的三组分环缩合反应,得到了多种杂环产物。优化反应条件表明需要相对少量的催化剂并且亚芳基异恶唑-5-(4 H)-在非常短的反应时间内获得。借助简单的过滤和乙醇结晶,对合成的杂环分子进行纯化。在该方法中,没有使用费力且昂贵的色谱方法来纯化产物,并且也避免了有机溶剂的使用。此外,从绿色化学的角度来看,该方法也很重要。该方法的优点包括方法简单、催化剂经济、耗时少、反应条件温和、可在室温下进行实验以及ZnO纳米催化剂的可回收性和可重复使用性。
Wahl; Meyer, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1908, vol. 146, p. 639