Tyrphostins. 5. Potent Inhibitors of Platelet-Derived Growth Factor Receptor Tyrosine Kinase: Structure−Activity Relationships in Quinoxalines, Quinolines, and Indole Tyrphostins
作者:Aviv Gazit、Harald App、Gerald McMahon、Jefferey Chen、Alexander Levitzki、Frank D. Bohmer
DOI:10.1021/jm950727b
日期:1996.1.1
3-arylquinoxalines were prepared and tested for inhibition of platelet-derivedgrowthfactorreceptortyrosinekinase (PDGF-RTK) activity. The potency of the inhibitors was found to be quinoxalines > quinolines > indoles. Lipophilic groups (methyl, methoxy) in the 6 and 7 positions and phenyl at the 3 position of quinoxalines and quinolines were essential for potency, in contrast to the hydrophilic catechol
A copper-catalyzed oxidative couplingreaction of o-phenylenediamines with 2-aryl/heteroarylethylamines using molecular oxygen as an oxidant has been developed. This approach provides a practical and direct access to construct quinoxalines in excellent yields at roomtemperature. The reaction has a broad substrate scope and exhibits excellent functional-group tolerance. This method could be easily
Elemental Sulfur-Mediated Synthesis of Quinoxalines from Sulfoxonium Ylides
作者:Trayambek Nath Chaubey、Paran J. Borpatra、Satyendra Kumar Pandey
DOI:10.1021/acs.orglett.3c01907
日期:2023.7.21
A novel straightforward and catalyst-free approach for synthesizing quinoxaline derivativesfrom sulfoxonium ylides and o-phenylenediamines mediated by elemental sulfur has been described. Due to the simple and mild reaction conditions, the sulfoxonium ylides and o-phenylenediamines decorated with different functional groups furnished moderate to high yields of quinoxaline derivatives and were well
A new approach for the synthesis of 2-substituted quinoxalines by Ga(ClO4)(3)-catalyzed cycloaddition of alpha-hydroxyketones and o-phenylenediamines is introduced. The reaction is catalyzed by 10 mol % of Ga(ClO4)(3) in EtOH at room temperature. It is performed under simple and mild conditions to afford the product in good yield. (C) 2012 Elsevier Ltd. All rights reserved.