Imposing Latency in Ruthenium Sulfoxide-Chelated Benzylidenes: Expanding Opportunities for Thermal and Photoactivation in Olefin Metathesis
作者:Gal Segalovich-Gerendash、Illya Rozenberg、Nebal Alassad、Noy B. Nechmad、Israel Goldberg、Sebastian Kozuch、N. Gabriel Lemcoff
DOI:10.1021/acscatal.0c00676
日期:2020.4.17
Herein we show the design and synthesis of an electron-rich, sulfoxide-chelated, ruthenium benzylidene. In contrast to previously reported sulfoxide-chelated ruthenium benzylidenes, this complex is more stable in a cis-dichloro conformation and is thus latent in typical olefin metathesis reactions. The complex was characterized by NMR, UV–vis, and X-ray spectroscopy, alongside density functional theory
Regioselective Chromatic Orthogonality with Light-Activated Metathesis Catalysts
作者:Efrat Levin、Sudheendran Mavila、Or Eivgi、Eyal Tzur、N. Gabriel Lemcoff
DOI:10.1002/anie.201500740
日期:2015.10.12
The ability to selectively guide consecutive chemical processes towards a preferred pathway by using light of different frequencies is an appealing concept. Herein we describe the coupling of two photochemical reactions, one the photoisomerization and consequent activation of a sulfur‐chelated latent olefin‐metathesis catalyst at 350 nm, and the other the photocleavage of a silyl protecting group at