synthesis of (-)-sordarin (1) was accomplished exploiting the following key reactions: (i) Ag(I)-catalyzed oxidative radical cyclization of a cyclopropanol derivative leading to a bicyclo[5.3.0]decan-3-one skeleton; (ii) Pd(0)-catalyzed intramolecular allylation reaction resulting in the entire strained bicyclo[2.2.1]heptan-2-one framework of sordaricin (2); (iii) selective dihydroxylation of terminal
(′)-Sordaricin, the aglycon of antifungal sordarin, was synthesized starting frombicyclo[5.3.0]decan-3-one derivative. The strained bicyclo[2.2.1]heptene framework of sordaricin was constructed by the palladium-catalyzedintramolecular Tsuji-Trost reaction.