Rh- and Pt-catalyzed cycloisomerization of enynes derived from terpenes

The Rh-catalyzed cycloisomerization of new terpenoid derivatives featuring an O-tethered enyne unexpectedly leads to polycyclic derivatives containing an inner cyclopropane ring or a diene moiety, depending on the structure of the enyne, as observed in the PtCl2-catalyzed processes. Copyright (C) 2008 John Wiley & Sons, Ltd.