Hydride compounds carbopalladation

Under palladium catalysis, the < -iodoallenylbenzene 146 first undergoes an intermolecular carbopalladation of the double bond in the added norbornene 116, and only then follows an intramolecular carbopalladation of the allene moiety in 146 ensuing /3-hydride elimination finally provides the tricyclic compound 147 (Scheme 37)7 ... 

However, even a--alkylpalladium intermediates formed upon carbopalladation of simple alkenes, which are usually prone to rapid )S-hydride elimination, may serve as relays as demonstrated in the synthesis of bicyclic (Scheme 36, Eq. and tricyclic compounds (Scheme 36, Eq. the latter consisting of three annelated... 

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