Immobilized metathesis tungsten oxo alkylidene catalysts and use thereof in olefin metathesis

US10427146B2 · kind B2 · utility

Assignee

• XiMo AG · CH

Inventors

• Georg Frater · Winterthur, CH
• Jeno Varga · Horw, CH
• Christophe Coperet · Val-de-Reuil, FR
• Victor Mougel · Zürich, CH
• Matthew Conley · Sheffield, GB

Key dates

• Filing date: Sep 30, 2014
• Grant date: Oct 1, 2019
• Expiry date: Sep 30, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2261/419
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Method of making an immobilized tungsten catalyst comprising or consisting of (≡SiO)X W(═O)(═CR1R2)(R3 or R4)2-x(L)z, comprising at least the following step (i): (i) reacting silica (Si02) with a tungsten oxo alkylidene complex comprising or consisting of (R3)(R4)W(═O)(═CR1R2)(L)y, preferably wherein ═CR1R2 is selected from ═CHC(CH3)3 or ═CH(C(CH3)2)C6H5 and R3 and R4 are independently selected from pyrrol-1-yl, 2,5-dimethylpyrrol-1-yl, or 2,5-diphenylpyrrol-1-yl, or —OR, wherein R is a six membered or 10 membered aryl ring, optionally substituted.