Olefin Epoxidation with Bis(trimethylsilyl) Peroxide Catalyzed by Inorganic Oxorhenium Derivatives. Controlled Release of Hydrogen Peroxide
作者:Andrei K. Yudin、Jay P. Chiang、Hans Adolfsson、Christophe Copéret
DOI:10.1021/jo010369m
日期:2001.6.1
using bis(trimethylsilyl) peroxide (BTSP) as oxidant in place of aqueous H(2)O(2). Using a catalytic amount of a proton source, controlled release of hydrogen peroxide helps preserve sensitive peroxorhenium species and enables catalytic turnover to take place. Systematic investigation of the oxorheniumcatalyst precursors, substrate scope, and effects of various additives on olefinepoxidation with
Catalytic epoxidation of aliphatic terminal olefins with sodium hypochlorite
作者:Bertha de Poorter、Bernard Meunier
DOI:10.1016/s0040-4039(01)90069-3
日期:1984.1
Meso-tetra(halogenophenyl)porphyrinatomanganese complexes catalyze the epoxidation of terminalolefins by sodium hypochlorite at room temperature; moderate to good yields of epoxides are obtained.
Method of forming a polyether-carbonate polyol using a CO2-philic compound or substituent
申请人:Hinz Werner
公开号:US20060224010A1
公开(公告)日:2006-10-05
A method of forming a polyethercarbonate polyol enhances incorporation of CO
2
into the polyethercarbonate polyol. The method provides a catalyst including a multimetal cyanide compound. An H-functional initiator, an alkylene oxide, and CO
2
are reacted in the presence of the multimetal cyanide compound in a reactor. The method further provides a CO
2
-philic compound or a CO
2
-philic substituent. The CO
2
-philic compound and substituent enhance incorporation of the CO
2
into the polyethercarbonate polyol and reduce formation of cyclic alkylene carbonates, such as cyclic propylene carbonate, which are undesirable byproducts.
Alkoxysilyl-containing adhesive sealants having improved tear propagation resistance
申请人:Evonik Degussa GmbH
公开号:US10087278B2
公开(公告)日:2018-10-02
Specific alkoxysily-modified polymers bearing alkoxysilyl groups distributed randomly or in block fashion along the polyether chain, and not just located at the chain termini, a process for preparing these alkoxysilyl-modified polymers, and compositions comprising these alkoxysilyl-modified polymers are provided.
Use of guanidine reaction products in the production of polyurethane systems
申请人:Evonik Degussa GmbH
公开号:US10100148B2
公开(公告)日:2018-10-16
The present invention provides specific alkoxylation products, a process for preparing them, compositions which comprise these alkoxylation products, and the use thereof.