Emerging applications of the tropylium ion as reagent, catalyst, and chromophore
Abstract
Abstract The cycloheptatrienyl (tropylium) ion is a planar, fully conjugated seven‐membered carbocycle containing six π‐electrons. It features a delocalized positive charge, making it a one‐carbon homolog of benzene. Owing to its unique electronic structure and facile accessibility, the tropylium ion has recently attracted increasing attention as a versatile reagent in organic synthesis. It has been employed as a Lewis acid and an oxidant in various organic transformations. Furthermore, tropylium‐based compounds have emerged as functional materials, including organic dyes and stimuli‐responsive systems. This review summarizes recent developments in tropylium‐mediated organic synthesis and highlights the intriguing properties and potential applications of tropylium ion derivatives.
Key Points
Objective
The aim is to explore the versatility of the tropylium ion as a reagent and its potential applications in various fields.
Methods
- Reviewed recent developments in tropylium-mediated organic synthesis.
- Analyzed the electronic structure and properties of the tropylium ion.
- Evaluated its applications as a Lewis acid and oxidant in transformations.
- Examined tropylium-based compounds in functional materials.
Results
- Tropylium ion demonstrates unique properties as a reagent in organic transformations.
- It acts effectively as a Lewis acid and an oxidant.
- Tropylium derivatives are emerging as valuable functional materials, including dyes.
- Recent applications indicate potential in stimuli-responsive systems.