73148-14-8Relevant academic research and scientific papers
Visible-light-induced decarboxylative alkylation of quinoxalin-2(1H)-ones with phenyliodine(III) dicarboxylates by cerium photocatalysis
He, Jingwen,Shen, Chao,Zhang, Lixi,Zhang, Pengfei,Zheng, Kai
, (2022/02/02)
Despite advances in the photoredox catalysis using organic dyes or expensive Ir and Ru complexes, the discovery and employment of photocatalysts based on alternative and abundant metal salts remain highly necessary. Herein, the visible-light-induced decarboxylative alkylation of quinoxalin-2(1H)-ones with phenyliodine(III) dicarboxylate has been accomplished using inexpensive and catalytic amount of CeCl3 as the photocatalyst. The novel protocol has advantages of mild conditions, high yields and good substrate scope. Control experiments indicate that a radical mechanism is responsible for the present transformation.
Metal-free alkylation of quinoxalinones with aryl alkyl ketones
Liu, Xinya,Guo, Zhuangzhuang,Liu, Yanpeng,Chen, Xiaoyu,Li, Jingya,Zou, Dapeng,Wu, Yangjie,Wu, Yusheng
supporting information, p. 1391 - 1395 (2022/03/01)
The first metal-free method for alkylation of quinoxalinones using cheap and stable aryl alkyl ketones as nucleophilic alkylation reagents is reported. This strategy greatly broadens the application channels of aryl alkyl ketones through carbon-carbon bon
Alkylation of quinoxalin-2(1H)-ones using phosphonium ylides as alkylating reagents
Liu, Jun-Jia,Peng, Sha,Yang, Luo
supporting information, p. 9705 - 9710 (2021/11/30)
A practical and efficient methodology for the construction of 3-alkylquinoxalinones through base promoted direct alkylation of quinoxalin-2(1H)-ones with phosphonium ylides as alkylating reagents under metal- and oxidant-free conditions was developed. Various 3-alkylquinoxalin-2(1H)-ones were easily obtained in good to excellent yields. Tentative mechanistic studies suggest that this reaction is likely to involve a nucleophilic addition-elimination process.
N, N, N', N'-Tetramethylethylenediamine-Enabled Photoredox-Catalyzed C-H Methylation of N-Heteroarenes
Liu, Fang,Ye, Zhi-Peng,Hu, Yuan-Zhuo,Gao, Jie,Zheng, Lan,Chen, Kai,Xiang, Hao-Yue,Chen, Xiao-Qing,Yang, Hua
, p. 11905 - 11914 (2021/08/24)
Aiming at the valuable methylation process, readily available and inexpensive N,N,N′,N′-tetramethylethylenediamine (TMEDA) was first identified as a new methyl source in photoredox-catalyzed transformation in this work. By virtue of this simple methylating reagent, a facile and practical protocol for the direct C-H methylation of N-heteroarenes was developed, featuring mild reaction conditions, broad substrate scope, and scalability. Mechanistic studies disclosed that a sequential photoredox, base-assisted proton shift, fragmentation, and tautomerization process was essentially involved.
Peroxide-mediated site-specific C-H methylation of imidazo[1,2-: A] pyridines and quinoxalin-2(1 H)-ones under metal-free conditions
Jin, Shengzhou,Yao, Hua,Lin, Sen,You, Xiaoqing,Yang, Yao,Yan, Zhaohua
supporting information, p. 205 - 210 (2020/01/13)
An effective approach to realize the direct methylation of imidazo[1,2-a]pyridines and quinoxalin-2(1H)-ones with peroxides under metal-free conditions is described. In this protocol, peroxides serve as both the radical initiator and methyl source. Methylated imidazopyridines and quinoxalin-2(1H)-ones were smoothly synthesized in moderate to good yields. A free radical reaction mechanism was proposed to describe the methylation process.
Preparation method of 3-methylquinoxaline-2-(1H)-one derivative
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Paragraph 0065-0070, (2020/05/30)
The invention discloses a preparation method of a 3-methylquinoxaline-2-(1H)-one derivative. The preparation method comprises the following steps: by taking elemental iodine as an oxidizing agent, sodium sulfite as an additive and tert-butyl hydroperoxide (TBHP) as a methyl source, carrying out a direct methylation reaction on carbon No. 3 on a quinoxaline-2-(1H)-one compound in an organic solvent, and after the reaction is completed, carrying out aftertreatment to obtain the 3-methylquinoxaline-2-(1H)-one derivative. The preparation method uses cheap and easily available reaction raw materials and is simple.
Visible-light induced decarboxylative alkylation of quinoxalin-2(1H)-ones at the C3-position
Xue, Wenxuan,Su, Yingpeng,Wang, Ke-Hu,Zhang, Rong,Feng, Yawei,Cao, Lindan,Huang, Dangfeng,Hu, Yulai
, p. 6654 - 6661 (2019/07/16)
A simple and efficient method for the visible light induced direct carbon alkylation of quinoxalin-2(1H)-ones at the C3 position is described. This protocol employs cheap and readily available phenyliodine(iii) dicarboxylates as the alkylation reagents to conduct decarboxylative radical coupling reaction with quinoxalin-2(1H)-ones. The process exhibits excellent compatibility to functional groups and provides a convenient and selective access to various 3-alkylquinoxalin-2(1H)-ones in good yields.
A Catalyst-Free Minisci-Type Reaction: the C–H Alkylation of Quinoxalinones with Sodium Alkylsulfinates and Phenyliodine(III) Dicarboxylates
Wang, Liping,Zhao, Jiquan,Sun, Yuting,Zhang, Hong-Yu,Zhang, Yuecheng
, p. 6935 - 6944 (2019/11/11)
A direct C–H alkylation of quinoxalinones at the C-3 position with sodium alkylsulfinates and phenyliodine(III) dicarboxylates has been developed under catalyst-free conditions. A series of 3-alkylquinoxalinones were afforded in moderate to excellent yields in this protocol, which offers a practical and efficient access to biologically interesting 3-alkylquinoxalin-2(1H)-one derivatives.
RING-opening reactions of 2-phenyl-1'H,5H-spiro-[oxazole-4,2'-quinoxalin]- 3'(4'H)-ones?
Music, Irena,Vercek, Bojan
, p. 719 - 725 (2013/08/23)
Several simple quinoxaline derivatives were prepared by ring-opening reactions of 2-phenyl-1'H,5H-spiro[oxazole-4,2'-quinoxalin]-3'(4'H)-one and its N-alkyl derivatives under various reaction conditions.
QUINOXALINONE DERIVATIVES AS INSULIN SECRETION STIMULATORS, METHODS FOR OBTAINING THEM AND USE THEREOF FOR THE TREATMENT OF DIABETES
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Page/Page column 48-49, (2009/10/22)
The present invention relates to quinoxalinone derivatives of formula (I), wherein R1, R2, R3, R4, R5 and R6 are as defined in claim 1, as insulin secretion stimulators. The invention also relates to the preparation and use of these quinoxalinone derivatives for the prophylaxis and/or treatment of diabetes and pathologies associated. Other preferred compounds are compounds of general formula (I), wherein R1, R2, R3, R4, R5 and R6 can be optionally substituted by one or more groups selected from Z.
