Formation of cyclohexa-1,4-diene by metathesis of linoleic and linolenic esters

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Abstract
The metathesis of linolenic and linolenic esters with tungsten hexachloride–tetramethyltin as catalyst yields a considerable amount of cyclohexa-1,4-diene (up to 30 mol % of the reaction mixture in the case of methyl linolenate) along with alkenes, and monocarboxylic and dicarboxylic esters.