Eine einfache Synthese makrocyclischer Kohlenwasserstoffe durch Metathese von Cycloolefinen
作者:Siegfried Warwel、Hans Kätker
DOI:10.1055/s-1987-28129
日期:——
A Simple Synthesis of Macrocyclic Hydrocarbons by Metathesis of Cycloolefins Metathesis of cycloolefins normally leads to unsaturated polymers. Using rheniumheptoxide on alumina, activated by tintetramethyl and working in dilution via soxhlet-similiar circulation system the metathesis reaction was directed to macrocyclic dienes, which are the dimers of the initial cycloolefins. Starting with C7-, C9- and C10-cycloolefins symmetric macrocyclic C14-, C18- and C20-dienes are obtained in yields of 58-74%. The metathetic dimerization of cyclooctene leads to 1.9-cyclohexadecadiene in a yield of 30%. By hydrogenation at room temperature and normal hydrogen-pressure all cyclodienes were converted quantitatively to cycloalkenes (catalyst: potassium on alumina) or to cycloalkenes (catalyst: palladium on carbon).
Convergent Synthesis of a Metal–Organic Framework Supported Olefin Metathesis Catalyst
作者:Jian Yuan、Alejandro M. Fracaroli、Walter G. Klemperer
DOI:10.1021/acs.organomet.6b00365
日期:2016.6.27
Synthesis of a metal–organic framework (MOF)-supported olefin metathesis catalyst has been accomplished for the first time following a new, convergent approach where an aldehyde-functionalized derivative of Hoveyda’s recently reported ruthenium catecholate olefin metathesis catalyst is condensed with an amine-functionalized IRMOF-74-III. The resulting material, denoted MOF-Ru, has well-defined, catalytically