Abstract The PtCl 2-and PtCl 4-catalyzed cycloisomerization of polyunsaturated precursors with different O-protecting groups at the propargylic position is reported. The free hydroxy, O- (bromomethyl) dimethylsilyl, O-methyl and O-propenyl derivatives 1a–f have afforded mixtures of skeletal rearrangement products and/or polycyclic molecules incorporating a cyclopropyl ring system in variable chemical yields. Other parameters such as the ...
