Synlett 2021; 32(03): 258-266
DOI: 10.1055/s-0040-1707231
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© Georg Thieme Verlag Stuttgart · New York

Sulfur-Chelated Ruthenium Olefin Metathesis Catalysts

Noy B. Nechmad
a   Department of Chemistry, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel   Email: Lemcoff@bgu.ac.il
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a   Department of Chemistry, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel   Email: Lemcoff@bgu.ac.il
b   Ilse Katz Institute for Nanotechnology Science, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
› Author Affiliations
This research was funded by the Israel Science Foundation (Grant Number 506/18).
Further Information

Publication History

Received: 25 June 2020

Accepted after revision: 04 July 2020

Publication Date:
07 August 2020 (online)


Abstract

This Account summarizes the historical development of latent sulfur-chelated ruthenium precatalysts from the Lemcoff group’s perspective. The most unique feature of this family of complexes is that they appear in the more stable cis-dichloro configuration, which is latent towards olefin metathesis reactions. Activation of the precatalyst, brought about by isomerization from the cis-dihalo to the trans-dihalo forms, can be achieved either by thermal or light stimuli. Modifications of the ligand sphere bestows unique properties upon the catalysts, which have been used in diverse applications, from 3D printing of metathesis polymers to orthogonally divergent synthetic pathways.

1 Introduction

2 Effect of Sulfur Substituents

3 Effect of Benzylidene Ligands

4 Effect of the NHC Ligands

5 Effect of the Anionic Ligands

6 Conclusions