Chiral cyclobutanones as versatile synthons: the first enantioselective total synthesis of (+)-laurene

Abstract
A novel and convenient route to the thermodynamically unstable ketone 11via the cyclopentanone 8 which was synthesised by palladium-mediated ring expansion of the chiral siloxyvinylcyclobutanes 9 and 10 has been developed. This leads to an enantioselective total synthesis of (+)- laurene 1.

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