A simple and efficient method for epoxidation of terminal alkenes
作者:Christophe Copéret、Hans Adolfsson、K. Barry Sharpless
DOI:10.1039/a703542j
日期:——
The use of a catalytic amount of 3-cyanopyridine in the
methyltrioxorhenium catalysed epoxidation of terminal alkenes with aqueous
hydrogen peroxide speeds turnover, which results in the formation of many
functionalized epoxides in high yields.
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.
室温下,内消旋四(卤代苯基)卟啉锰锰配合物催化末端烯烃的环氧化。获得了中等至良好的环氧化物收率。
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.