Synthesis of potential chemotherapic quinoxalinone derivatives by biocatalysis or microwave-assisted Hinsberg reaction
摘要:
In recent years, great efforts have been dedicated to the design of compounds acting as selective inhibitors of the HIV-1 reverse transcriptase (RT). Due to the promissory results previously attained with some quinoxaline derivatives, we aimed to improve the specific standard Hinsberg synthetic pathway by means of biocatalysis or microwave (MW) irradiation. Both techniques rendered the products in very good yields. However, employing the microwave-assisted organic synthesis (MAOS), in the absence of solvent, the same reactions may be completed in minutes. Some of these quinoxalmone derivatives exhibited good inhibitor activity against some human tumoral cells and the lymphoma related to HIV-1. (c) 2007 Elsevier Ltd. All rights reserved.
Substituted benzene‐1,2‐diamine reacted with various α‐keto esters at 50° under mild conditions for 15 min using H2O as reaction medium, providing a variety of 3‐substituted quinoxalinone derivatives in excellent yields. The reaction was instantaneous, and products were isolated by simple filtration.
Provided are compounds having a first ligand L
A
of
that are useful in OLEDs as emitters.
提供了具有第一配体LAof的化合物,可用作OLED中的发射剂。
Kinetic study on the synthesis of some benzo[<i>g</i>]quinoxalin-2(1<i>H</i>)-one derivatives
作者:Gabriela A. Rodrigo、Sergio G. Renou、Diana G. Bekerman、M. Inés Abasolo、Beatriz M. Fernández
DOI:10.1002/jhet.5570340225
日期:1997.3
relative high values (1 × 10−1 — 1 × 10−2 min−1). On the other hand, only methanol could be used as the organic solvent for the synthesis of all of the other compounds; aqueous media always provided better results. In the 3-methyl derivative, as well as in the 3-phenyl derivative the change of the reaction pH medium modified the stoichiometry of the anelation, turning a non-quantitative reaction into a
ORGANOMETALLIC COMPOUND, ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE ORGANOMETALLIC COMPOUND, AND ORGANIC LIGHT-EMITTING APPARATUS INCLUDING THE ORGANIC LIGHT-EMITTING DEVICE
申请人:Samsung Display Co., Ltd.
公开号:US20190062357A1
公开(公告)日:2019-02-28
An organometallic compound is represented by Formula 1. An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer and at least one of the organometallic compound. An organic light-emitting apparatus includes the organic light-emitting device.
Iron-catalyzed methylation of quinoxalin-2(1H)-ones with dimethyl sulfoxide under visible light irradiation
作者:Hong He、Zhongyi Zhang、Yicheng Zhang、Chao Zhou、Jie Liu、Lei Wang
DOI:10.1016/j.mcat.2024.113999
日期:2024.4
The synthesis of iron-catalyzed -methylation of quinoxalin-2(1)-ones using dimethyl sulfoxide as the methylating reagent is described herein. The cross-coupling reactions proceeded smoothly under visible-light irradiation, which generated the corresponding products in moderate to good yields. Further investigation on the application of the methylation reaction using readily available DMSO as the methylation