Catalytic Electrophilic Reactions of Chrysanthemic Acid Derivatives with Unsaturated Organosilanes. An Application to Synthesis of Modified Types of C15 and C20 Isoprenoids with Non-Head-to-Tail Linkages

Article abstract of DOI:10.1021/jo00374a012

Chrysanthemyl silyl ether (2b) reacted with allylic and enolic silanes in the presence of TiCl4 as a catalyst to give selectively C1-C3 ring-opened and ε-substituted products (yomogi type product).Chrysanthemaldehyde (3) and the corresponding methyl keton