Transition-Metal-Free Cascade C –N Bond Formation: An Effective Strategy for the Synthesis of β-Carboline N-Fused Imidazolium Acetates and Estimation of their Light-Emitting Properties

Synthesis DOI: 10.1055/s-0041-1738447 A simple, efficient, and practical metal-free protocol has been devised to synthesize imidazopyrido[3,4-b]indole-based fluorophores decorated with carbazole/β-carboline/pyridine scaffolds via three consecutive C–N bond formations in a single operation. A wide range of aromatic amines (2-aminopyridines, 3-aminocarbazole, and anilines) were successfully applied to synthesize the complex imidazolium ions. The significant features of this strategy include high efficiency, mild and environmentally benign reaction conditions, no chromatographic purification, and broad substrate scope with excellent yields of the isolated products. Moreover, excellent photophysical properties (ΦF up to 85%) were exhibited by these fluorophores. [...] Georg Thieme Verlag KG Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of contents  |  Abstract  |  Full text
Source: Synthesis - Category: Chemistry Authors: Tags: paper Source Type: research