The metathesis of 1-octene with the W(O-2,6-C6H3X2)2Cl4/R4Sn catalytic system

Metathesis of renewable raw materials—influence of ligands in the indenylidene type catalysts on self-metathesis of methyl oleate and cross-metathesis of methyl oleate with (Z)-2-butene-1,4-diol diacetate

“…This issue is essential because during the metathesis reaction a mixture of products can be formed due to alkene C-C double bond migration and isomerization which can occur both in substrates and products. These isomerisation products can also undergo a metathesis reaction, therefore in the reaction mixture three major groups of products can be identified (Scheme 1): primary metathesis products (PMP), isomerization products (IP) and secondary metathesis products (SMP), 33 which leads to a decrease in the yield of the desired products. Additionally, the side products resulting from unwanted isomerization, like monounsaturated hydrocarbons, α,ω-diesters, or monoesters with different chain lengths, 34 are frequently difficult to remove via standard purification techniques.…”

Reactivity of Tungsten-aryloxides with Hydrosilane Cocatalysts in Olefin Metathesis

“…The cocatalysts most frequently reported in the literature for [WCl 4 (OAr) 2 ] are aluminumalkyl and leadalkyl compounds. The literature contains few examples 11,19 of [WCl 4 (OAr) 2 ]-SnMe 4 , whose reactions were performed at 85 °C. Vosloo et al 19 reported that activity increased drastically from 50 to 65 °C in metathesis with the [WCl 4 (OAr) 2 ]-SnBu 4 system, although they found no activity at 50 o C for that system.…”

“…The literature contains few examples 11,19 of [WCl 4 (OAr) 2 ]-SnMe 4 , whose reactions were performed at 85 °C. Vosloo et al 19 reported that activity increased drastically from 50 to 65 °C in metathesis with the [WCl 4 (OAr) 2 ]-SnBu 4 system, although they found no activity at 50 o C for that system. Therefore, we repeated the reaction for [WCl 4 (O-C 6 H 3 Cl 2 ) 2 ] at 65 °C (Table 2).…”

Low Catalyst Loadings in Self‐Metathesis of 1‐Dodecene

“…Most significant of those are double‐bond isomerization and secondary metathesis of isomerized compounds. Therefore three major groups of products can be identified (Scheme ): primary metathesis products ( PMP ), isomerization products ( IP ) and secondary metathesis products ( SMP ) 7…”