The Transalkylidenation Of Two Terminal Alkenes Under Release Of Ethene, Catalyzed By Ruthenium Carbenoids (Grubbs Catalyst). Statistically, The Reaction Can Lead To Three Possible Pairs Of Geometric Isomers, I.e. E/Z pairs For Two Homocouplings And The Cross-coupling (R-CH=CH-R, R'-CH=CH-R', And R-CH=CH-R') - A Total Of 6 Products.
The Selectivity Of This Reaction Is Currently Undergoing Further Study, But Various Examples Exist In Which Two Alkenes With Different Reactivity Give The Cross-coupled Product With Excellent Yields And Excellent Selectivity.
Recent Literature
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