A Selenide Catalyst for the Activation of Alkenes through Se⋅⋅⋅π Bonding
作者:Xinglong Yuan、Yao Wang
DOI:10.1002/anie.202203671
日期:2022.7.4
A new selenidecatalyst was discovered and fully characterized. It was shown to be highly efficient when applied to the catalysis of alkene transformations. Several examples using this weak interaction (Se⋅⋅⋅π) catalysis were demonstrated with, in particular, the possibility of intermolecular enyne cyclizations as well as cross-coupling of triple alkenes taking place.
The dicationic diruthenium complex 1c (Ru-III-Ru-III) catalytically promotes the dimerization of alpha-methylstyrenes into the corresponding acyclic dimers, while the use of the mixed-valence diruthenium complex (Ru-III-Ru-IV) generated from 1c and cinnamyl chloride as an active catalyst affords the corresponding indanes via cyclization of the acyclic dimers. The selectivity of the catalytic dimerization of alpha-methylstyrenes depends on the nature of electrophilicity due to valence electrons in the diruthenium cores between Ru-III-Ru-III and Ru-III-Ru-IV.