In water organic synthesis: Introducing itaconic acid as a recyclable acidic promoter for efficient and scalable synthesis of quinoxaline derivatives at room temperature
作者:Kashyap J. Tamuli、Shyamalendu Nath、Manobjyoti Bordoloi
DOI:10.1002/jhet.4231
日期:2021.4
Substituted quinoxalinederivatives are traditionally synthesized by co‐condensation of various starting materials. Herein, we describe a novel environmentally benign in water synthetic route for the synthesis of structurally and electronically diverse ninety quinoxalines with readily available substituted o‐phenylenediamine and 1,2‐diketones using cheap and biodegradable itaconic acid as a mild acid
An efficient method for the synthesis of quinoxaline derivatives catalyzed by titanium silicate-1
作者:Pranav S. Chandrachood、Amol R. Jadhav、Dinesh R. Garud、Nirmala R. Deshpande、Vedavati G. Puranik、Rajashree V. Kashalkar
DOI:10.1007/s11164-020-04258-w
日期:2020.12
A series of quinoxaline derivatives were efficiently synthesized by convenient and simple procedure in excellent yields using 1 wt.% of titanium silicate (TS-1) catalyzed reaction of 1,2-diamines and 1,2-diketones in methanol at room temperature. This reaction is scalable to multigram scale and the catalyst is recyclable.
Keggin-type heteropoly-12-tungstophosphoric acid, (H3[PW12O40].12H2O) supported on graphitic carbon nitride g-C3N4 (HPW/g-C3N4-40), was developed for one-pot synthesis of quinoxaline derivatives from 1,2-diketone and 1,2-diamines. Use of green solvent, heterogeneous reaction condition, simple workup procedure, short reaction time and reusability of the catalyst are the advantages of this protocol.
开发了一种绿色的Keggin型杂多12-钨磷酸(H 3 [PW 12 O 40 ] .12H 2 O),负载在石墨氮化碳gC 3 N 4(HPW / gC 3 N 4 -40)上。锅合成1,2-二酮和1,2-二胺喹喔啉衍生物。使用绿色溶剂,反应条件不均匀,后处理步骤简单,反应时间短和催化剂的可重复使用性是该方案的优点。
NbCl5 as an efficient catalyst for rapid synthesis of quinoxaline derivatives
作者:Jun-Tao Hou、Yong-Hui Liu、Zhan-Hui Zhang
DOI:10.1002/jhet.388
日期:——
A series of quinoxaline derivatives have been synthesized in excellent yields by the condensation of 1,2-diketones and 1,2-phenylenediamines in the presence of a catalytic amount of NbCl5 at room temperature in short times. J. Heterocyclic Chem., (2010).
A novel approach to l-tryptophan grafting on mesoporous MCM-41: A recoverable heterogeneous material for organocatalyzed benzo[N,N]-heterocyclic condensation
of a series of aromatic 1,2-diamines with 1,2-diketones in methanol at roomtemperature. Overall, the organocatalytic reaction proceeded smoothly to afford the corresponding quinoxalines in moderate to excellent yields. Furthermore, the crystal structure of an unsymmetrical quinoxaline has been determined by single crystal X-ray diffraction. This metal-free procedure offers several noteworthy advantages