Synthesis
DOI: 10.1055/a-2626-6825
Paper

Halide-Substituted Grubbs–Hoveyda Catalysts for Aqueous Ring-Closing Metathesis

Jun Okuda
Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
,
Aaron Ingram
Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
,
Dong Wang
Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
› Author Affiliations

Supported by: German Federal Ministry of Education and Research (BMBF)
Funding Information We acknowledge the Bioökonomie REVIER_INNO PlastiQuant (FKZ:031B0918E) and the German Federal Ministry of Education and Research (BMBF) for financial support.


Preview

Dedication

This paper is dedicated to Professor Paul Knochel on the occasion of his 70th birthday.

Abstract

The effect of halide substitution in ionic-substituted second-generation Grubbs–Hoveyda catalysts (GHII catalysts, AquaMet®) on the ring-closing metathesis activity toward N,N-diallyltosylamide in aqueous media was studied by varying the reaction conditions of biological relevance (pH, buffer, salt additives). The activity, as determined by GC–MS analysis, followed the order: bromide > chloride > iodide. The robustness of these complexes, as judged by time-resolved UV–vis absorptions, followed the reverse order: iodide > chloride > bromide. Diiodide-substituted GHII catalysts performed better than the dichloride and dibromide in the ring-closing metathesis of (N-alkenyl)(N-allyl)tosylamides in aqueous buffer solutions. Catalyst decomposition by hydrolysis appears to be suppressed for the diiodo GHII catalyst in aqueous buffer solutions.

Supplementary Material



Publication History

Received: 06 May 2025

Accepted after revision: 03 June 2025

Accepted Manuscript online:
03 June 2025

Article published online:
23 July 2025

© 2025. Thieme. All rights reserved.

Georg Thieme Verlag KG
Oswald-Hesse-Straße 50, 70469 Stuttgart, Germany