# Olefin metathesis in air

## TL;DR

This paper reviews the development of olefin metathesis catalysts that can work in air and water, making the process more practical and versatile.

## Contribution

The paper provides a comprehensive review of advances in air and water-tolerant olefin metathesis catalysts.

## Key findings

- Early catalysts required strict exclusion of air and water.
- Recent catalysts are more air and water stable while maintaining functionality.
- The review highlights progress in making metathesis more practical for real-world applications.

## Abstract

Since the discovery and now widespread use of olefin metathesis, the evolution of metathesis catalysts towards air stability has become an area of significant interest. In this fascinating area of study, beginning with early systems making use of high oxidation state early transition metal centers that required strict exclusion of water and air, advances have been made to render catalysts more stable and yet more functional group tolerant. This review summarizes the major developments concerning catalytic systems directed towards water and air tolerance.