摘要描述了一种简单有效的一锅法,用于在室温下通过邻苯二胺,羰基化合物和异氰化物在乙醇中的三组分缩合反应合成生物学上令人感兴趣的3,4-二氢喹喔啉-2-胺衍生物。在这项工作中,与其他方法不同,在10摩尔%的四氯化锆作为催化剂的存在下,醛类和酮类也发生了反应,从而提供了良好的产品收率。该方法由于其对环境有益的特性,高收率,易于处理以及对醛和酮的可靠性而具有重要的价值。通过IR,1 H NMR,13 C NMR和元素分析系统地表征了新合成的化合物。 图形概要醛,邻苯二胺衍生物和异氰酸酯的新型催化一锅三组分反应,用于在四氯化锆存在下合成3,4-二氢喹喔啉-2-胺衍生物 。
Synthesis and anti-neuroinflammatory activity studies of substituted 3,4-dihydroquinoxalin-2-amine derivatives
作者:Donthabhakthuni Shobha、Murugulla Adharvana Chari、Khagga Mukkanti、Sun Yeou Kim
DOI:10.1016/j.tetlet.2012.03.057
日期:2012.5
We demonstrate the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives 4 through a three-component condensation reactions of a substituted o-phenylenediamines 1 (OPDA), diverse ketones 2 and various isocyanides 3 in the presence of a catalytic amount of p-toluenesulfonic acid (PTSA) affording excellent yields (82–96%) and 10 mol % of silica gel supported sulfuric acid with good yields
Visible-Light-Mediated Synthesis of 4H-benzo[1,4]thiazin-2-amines and 3,4-Dihydroquinoxalin-2-amines: An Efficient and Metal Free Route to C–S, C–N Bond Formation
作者:Neetu Yadav、Hozeyfa Sagir、Mohd. Danish Ansari、I. R. Siddiqui
DOI:10.1007/s10562-018-2388-2
日期:2018.6
and practical synthesis of benzothiazine by visible-light-mediated free radical reaction has been developed. This protocol provides a new, facile, eco-friendly strategy to construct benzothiazine and quinoxaline derivatives via formation of C–S and C–N bonds under metal-free condition. This synthesis has been performed under visible light illumination in aqueous ethanol at roomtemperature using aromatic
Here we demonstrate on the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives through a three-component condensation of substituted o-phenylenediamines (OPDA), diverse ketones, and various isocyanides in the presence of AlKIT-5 catalyst which was found to be highly active and selective, affording excellent yields (85-98%) in ethanol at room temperature (2-4 h).
Amberlyst-15: an efficient and reusable catalyst for multi-component synthesis of 3,4-dihydroquinoxalin-2-amine derivatives at room temperature
作者:Murugulla Adharvana Chari
DOI:10.1016/j.tetlet.2011.09.015
日期:2011.11
We demonstrate on the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives through a three-component condensation of substituted o-phenylenediamines (OPDA), diverse ketones, and various isocyanides in the presence of an efficient and reusable amberlyst-15 catalyst which was found to be highly active and afforded excellent yields (85–99%) in ethanol at room temperature (2–3 h).
A novel catalytic one-pot three-component reaction of aldehydes, o-phenylenediamine derivatives and isocyanides for synthesis of 3,4-dihydroquinoxalin-2-amine derivatives in the presence of zirconium tetrachloride
作者:Seyed Ali Jehbez、Hamid Reza Safaei
DOI:10.1007/s13738-018-1301-7
日期:2018.5
synthesis of biologically interesting 3,4-dihydroquinoxalin-2-amine derivatives through a three-component condensation reaction of o-phenylenediamines, carbonyl compounds and isocyanides in ethanol at room temperature is described. In this work, unlike the other methods, aldehydes reacted as well as ketones in the presence of 10 mol% of zirconium tetrachloride as catalyst to afford good to excellent yields
摘要描述了一种简单有效的一锅法,用于在室温下通过邻苯二胺,羰基化合物和异氰化物在乙醇中的三组分缩合反应合成生物学上令人感兴趣的3,4-二氢喹喔啉-2-胺衍生物。在这项工作中,与其他方法不同,在10摩尔%的四氯化锆作为催化剂的存在下,醛类和酮类也发生了反应,从而提供了良好的产品收率。该方法由于其对环境有益的特性,高收率,易于处理以及对醛和酮的可靠性而具有重要的价值。通过IR,1 H NMR,13 C NMR和元素分析系统地表征了新合成的化合物。 图形概要醛,邻苯二胺衍生物和异氰酸酯的新型催化一锅三组分反应,用于在四氯化锆存在下合成3,4-二氢喹喔啉-2-胺衍生物 。