Carbon Bond Formation via Allenylidene-Ene Reactions

Carbon-Carbon Bond Formation via Allenylidene-Ene Reactions 

Esteruelas and coworkers reported the stoichiometric Diels-Alder type addition of dienes to the Cp-Cy double bond of allenylidene complexes to give the corresponding substituted vinylidene complexes (Equation 7.7) [33]. The results of this stoichiometric reaction prompted us to investigate the diruthenium complex-catalyzed allenylidene-ene reaction between alkenes and the Cp-Cy double bond of an allenylidene moiety. Results of inter- and intramolecular allenylidene-ene reactions providing novel coupling products between alkynes and alkenes are described in this section [34]. 

Intramolecular reactions of propargylic alcohols bearing an alkene unit at a suitable position proceeded smoothly to give the corresponding substituted chro- 

Reductive Coupling Reaction via Hydroboration of Allenylidene Intermediates 

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Carbon-Carbon Bond Formation via Allenylidene-Ene Reactions 237 5 mol% la... 

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