Synthetic Photochemistry. XXXIV. Synthetic Strategy of 5-8-5-Membered Tricyclic Higher Terpenoids Based on the Condensation of Two Optically-Active Iridoids, C10-Synthons Obtained from Photo-Cycloadduct of Methyl 2,4-Dioxo-pentanoate-Isoprene, and Its App

Article abstract of DOI:10.1246/bcsj.59.1109

One of the photocycloadducts obtained during methyl 2,4-dioxopentanoate to isoprene was converted to optically active iridoids.Using a CrCl2 reductive-couping reaction, proper combinations of two kinds of enantiomeric iridoids, 1-iriden-7-al and 9-benzylo