Potassium Tert ‐Butoxide‐Promoted Synthesis of Fluorescent β‐Carboline Tethered 1,3,5‐Triazines and Assessment of Their Luminescent Properties

Abstract

A transition metal-free efficient approach has been devised towards the construction of novel β-carboline C1(3)-tethered 1,3,5-triazines by using Kumujian C as a template and readily available amidines. These β-carboline-triazine conjugates exhibited excellent photophysical properties with quantum yield (ΦF) up to 60%. A transition metal-free, base-mediated efficient synthesis of novel β-carboline C1(3) tethered triazines has been accomplished by using β-carboline alkaloid; Kumujian C as a template for reaction with readily available amidines. The strategy has been found compatible with diverse 1(3)-formyl β-carbolines and amidines, providing access to wide variety of novel β-carboline linked 1,3,5-triazines in good to excellent yields. The methodology is also amenable to gram scale synthesis of triazines. The presented methodology features sustainable reaction conditions, clean and simple methodology, low environmental impact, wide substrate scope and high atom economy with good to excellent yields. Moreover, the light emitting properties of these fluorescent β-carboline linked triazine derivatives were investigated for the first time where quantum yield (ΦF) up to 60% was obtained.