C–H functionalization via single atom metathesis of C–H and C–X bonds

20 March 2025, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Metathesis and reversible catalytic reactions are fundamentally intriguing and powerful tools in modern synthetic chemistry. While most reversible catalytic reactions are predicated on breaking and forming reactive functional groups, the ability to leverage the C–H bond as a functional group into metathesis reactions has proved to be exceptionally challenging. Here, we develop a C–H/C–X metathesis reaction through a radical swapping protocol where a hydrogen and halogen are traded between molecules via reversible hydrogen atom transfer (HAT) and halogen atom transfer (XAT) that allows for mild C–H halogenation. The reversibility of this process allows for selective dehalogenation of polyhalogenated products to form monohalogenated products. Leveraging the reversibility of this process, halogenated organic pollutants can also serve as a halogen source for C–H halogenation. In the broader context, this work establishes that incorporating reversible metathesis logic in C–H bond functionalization can provide complementary advantages in synthetic strategies.

Keywords

hydrogen atom transfer
halogen atom transfer
metathesis
waste upcycling

Supplementary materials

Title
Description
Actions
Title
SI
Description
SI
Actions

Comments

Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.