Controlled, Stepwise Syntheses of Oligomers with Modified Quinoxaline Backbones

New oligomers based on quinoxaline units were successfully synthesized through multistep reactions using Wittig coupling, affording (E)-(quinoxalin-2-yl)ethene oligomers. Diverse quinoxaline-based phosphonium salts were designed and synthesized, enabling versatility and compatibility regarding the oligomer-building process. The characterization of the oligomers showed excellent stereoisomer specificity, i.e., a fully E-configurated conjugated pi-system. The oligomers' light absorption/emission profiles indicate potential properties for an application in materials science.

Automated summary

New oligomers based on quinoxaline units were synthesized through multistep reactions, using Wittig coupling to yield (E)-(quinoxalin-2-yl)ethene oligomers. Diverse quinoxaline-based phosphonium salts were designed and synthesized, providing versatility and compatibility in the oligomer-building process. Characterization of the oligomers revealed excellent stereoisomer specificity, with a fully E-configurated conjugated pi-system. The light absorption/emission profiles of the oligomers indicate potential applications in materials science.