Olefins and acetylenes are carbonylated to a carboxylic acid or ester using a homogenous catalyst system comprising palladium together with iron or a metal of Groups IVA, VA or IIIB, the catalyst being either a polynuclear complex incorporating both metals, or a mixture of a soluble palladium salt and metal halide. Starting with cyclic di-olefins, such as cyclo-octadiene, the product cycloalkenyl carboxylic acid or ester may be cleaved to give acyclic dicarboxylic acids, such as azelaic acid.
The present invention relates to ethyl cyclooct-3/4-ene-1-carboxylates, and to a process of making the same. The invention further refers to flavour and fragrance compositions comprising them.
[EN] TELECHELIC PREPOLYMERS AND REACTION PRODUCTS THEREOF<br/>[FR] PRÉPOLYMÈRES TÉLÉCHÉLIQUES ET LEURS PRODUITS DE RÉACTION
申请人:UNIV MINNESOTA
公开号:WO2017023506A1
公开(公告)日:2017-02-09
Gem-dialkyl cyclooctene monomers, telechelic prepolymers prepared by ring opening metathesis polymerization of the monomers, and polymers such as polyurethanes comprising the reaction product of the prepolymer and a co-monomer such as a polyisocyanate.