title: Toward a silicon version of metathesis: from Schrock-type titanium silylidenes to silatitanacyclobutenes.
abstract: Olefin metathesis is one of the most important industrial processes for the production of alkenes. In contrast, silicon versions of metathesis are unknown given the lack of available silylene transition-metal complexes suitable for [2 + 2] cycloaddition with unsaturated substrates. Here, we report the synthesis of 18-electron titanium silylene complexes featuring different Lewis base ligands and classified on the basis of structural, computational, and reactivity studies as Schrock-type silylene complexes. Because of the presence of loosely bound Lewis base ligands, such silylene complexes readily undergo reaction with simple unsaturated hydrocarbons, such as alkynes, forming the corresponding [2 + 2] cycloaddition products.
authors: Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan. leevya@chem.tsukuba.ac.jp
authors: Vladimir Ya
authors: VY
authors: Lee
authors: Shinji
authors: S
authors: Aoki
authors: Taka
authors: T
authors: Yokoyama
authors: Satoru
authors: S
authors: Horiguchi
authors: Akira
authors: A
authors: Sekiguchi
authors: Heinz
authors: H
authors: Gornitzka
authors: Jing-Dong
authors: JD
authors: Guo
authors: Shigeru
authors: S
authors: Nagase