Zirconium mediated total synthesis of crinitol, 9-hydroxyfarnesoic acid, 9-hydroxyfarnesol, 9-hydroxysargaquinone and the selectivelyprotected aglycone of moritoside and euplexide A

Tandem formation of an unsaturated zirconacycle, insertion of methallyl carbenoid, and addition of an aldehyde provides a rapid synthetic route to several linear terpenoid and terpene–polyketide natural products.