Eco-friendly synthesis of 3,4-dihydroquinoxalin-2-amine, diazepine-tetrazole and benzodiazepine-2-carboxamide derivatives with the aid of MCM-48/H<sub>5</sub>
PW<sub>10</sub>
V<sub>2</sub>
O<sub>40</sub>
efficient, eco‐friendly and highly recyclable catalyst for the one‐pot and multicomponentsynthesis of 3,4‐dihydroquinoxalin‐2‐amine, diazepine‐tetrazole and benzodiazepine‐2‐carboxamide derivatives in aqueous media and at room temperature with high yields in short reaction times (40–60 min). The recoverable catalyst was easily recycled at least five times without any loss of catalytic activity. The
生产了由MCM-48 / H 5 PW 10 V 2 O 40组成的非均质材料,并将其用作高效,生态友好且高度可回收的催化剂,用于3,4-二氢喹喔啉-2-胺的一锅多组分合成,二氮杂-四唑和苯并二氮杂-2-羧酰胺衍生物在水性介质中和室温下以高收率在较短的反应时间(40-60分钟)内产生。可回收的催化剂易于循环至少五次,而没有任何催化活性的损失。使用1 H NMR和13 C NMR光谱确认获得的产物的结构。
CAN-catalyzed syntheses of 3,4-dihydroquinoxalin-2-amine derivatives based on isocyanides
作者:Jian Li、Yuejin Liu、Chunju Li、Xueshun Jia
DOI:10.1016/j.tetlet.2009.09.022
日期:2009.11
Starting from readily available o-phenylenediamines 1, ketones 2 and isocyanides 3, a variety of highly substituted 3,4-dihydroquinoxalin-2-amine derivatives 4 were efficiently synthesized in the presence of catalytic amount of cerium(IV) ammonium nitrate at room temperature The flexibility of this protocol also opens a new route to the Structurally unique spirocyclic analogs when cyclic ketones are employed (C) 2009 Elsevier Ltd All rights reserved
EDTA-catalyzed synthesis of 3,4-dihydroquinoxalin-2-amine derivatives by a three-component coupling of one-pot condensation reactions in an aqueous medium
作者:Srinivasa Rao Kolla、Yong Rok Lee
DOI:10.1016/j.tet.2010.09.050
日期:2010.11
This paper describes a simple and efficient one-pot synthetic approach for the preparation of biologically interesting 3,4-dihydroquinoxalin-2-amine derivatives using EDTA-catalyzed three-component reactions of o-phenylenediamines, carbonyl compounds, and isocyanides in an aqueous medium. This method is of great value because of its environmentally benign character, high yields, and ease of handling. (C) 2010 Elsevier Ltd. All rights reserved.
Rapid and Efficient One-Pot Synthesis of 3,4-Dihydroquinoxalin-2-Amine Derivatives Catalyzed by Co<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Core-Shell Nanoparticles Under Ultrasound Irradiation
作者:Mohammad Ali Ghasemzadeh、Boshra Mirhosseini-Eshkevari、Mohammad Hossein Abdollahi-Basir
DOI:10.2174/1386207319666160524141831
日期:2016.7.12
three-component reactions of ophenylenediamines (OPDA), diverse ketones and various isocyanides in ethanol underultrasoundirradiation. The combinatorial synthesis was attained for this procedure with applying ultrasoundirradiation while making use of ethanol as green ambient. The present approach offers several advantages such as high yields, environmentally benign, simple work-up, excellent yield of products