A reactive compound represented by the following formula (I):
[In the formula (I), Z represents a divalent group. A plurality of Y may be the same or different, and represent a monovalent boronate residue having at least one hydroxyl group, Ar
1
and Ar
2
may be the same or different, and represent a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group.].
Rapid, efficient and eco-friendly procedure for the synthesis of quinoxalines under solvent-free conditions using sulfated polyborate as a recyclable catalyst
作者:KRISHNA S INDALKAR、CHETAN K KHATRI、GANESH U CHATURBHUJ
DOI:10.1007/s12039-017-1235-0
日期:2017.2
A highly efficient and improved synthetic methodology for the preparation of quinoxalinederivatives from various substituted o-phenylenediamines and 1,2-diketones/α-hydroxy ketones using eco-friendly, economic and recyclable sulfated polyborate catalyst under the solvent-free condition is reported. Mild reaction conditions, shorter reaction times, higher yields, ease of workup, recyclability of the
One-pot synthesis of quinoxalines from reductive coupling of 2-nitroanilines and 1,2-diketones using indium
作者:Ahra Go、Geunsoo Lee、Jaeho Kim、Seolhee Bae、Byung Min Lee、Byeong Hyo Kim
DOI:10.1016/j.tet.2015.01.007
日期:2015.2
reduction-cyclization of 2-nitroanilines and 1,2-diketones to give quinoxalines was investigated. Using indium and an appropriate acid such as acetic acid or indium(III) chloride, various quinoxaline derivatives including 2,3-dialkylquinoxalines, 2,3-diphenylquinoxalines, 2,3-di-2-thiophenylquinoxalines, 2,3-di(pyridin-2-yl)quinoxalines, and dibenzo[a,c]phenazines were synthesized in moderate to excellent
Synthesis, crystal structure and calculation of oxides of 2-methylamino-3-methyl quinoxaline
作者:Rui Wang、Min Zhang、Wenfeng Wang、Xucheng Wang、Yaofeng Yuan、Junjian Li
DOI:10.1016/j.molstruc.2020.128826
日期:2020.12
Abstract Monoxide and dioxide of animo quinoxaline were synthesized and characterized by 1H NMR, 13C NMR and HRMS. The result shows that monoxide is main product. 1H NMR analysis, quantum calculation and crystalstructure all indicate that the monoxide is 4-oxide structure but not 1-oxide structure. The subsequent discussions of electronic effect and steric effect of 1-oxide and 4-oxide support the
Asymmetric Transfer Hydrogenations of 2,3-Disubstituted Quinoxalines with Ammonia Borane
作者:Songlei Li、Wei Meng、Haifeng Du
DOI:10.1021/acs.orglett.7b00935
日期:2017.5.19
An asymmetrictransferhydrogenation of 2,3-disubstituted quinoxalines using a chiral frustrated Lewis pair of Piers’ borane and (R)-tert-butylsulfinamide as the catalyst with ammoniaborane as the hydrogen source has been successfully realized. For 2-alkyl-3-arylquinoxaline substrates, cis-tetrahydroquinoxalines were obtained as the predominant products in high yields with 77–86% ee. In contrast,