2484-64-2Relevant academic research and scientific papers
A Simple Synthesis of Macrocyclic Hydrocarbons by Metathesis of Cycloolefins
Warwel, Siegfried,Kaetker, Hans
, p. 935 - 937 (2007/10/02)
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 cyclolefins.Starting with C7-, C9- and C10-cycloolefins symmetric macrocyclic C14-, C18- and C20-dienes are obtained in yields of 58-74percent.The metathetic dimerization of cyclooctene leads to 1,9-cyclohexadecadiene in a yield of 30percent.By hydrogenation at room temperature and normalhydrogen-pressure all cyclodienes were converted quantitatively to cycloalkenes (catalyst: potassium on alumina) or to cycloalkanes (catalyst: palladium on carbon).
