Synthesis of Pyranicin and Its Inhibitory Action with Bovine Heart Mitochondrial Complex I

Abstract
Total synthesis of pyranicin was achieved using Cl2Pd(CH3CN)2-catalyzed diastereoselective cyclization of the allylic ester as the key step. The inhibitory activity of this compound for mitochondrial NADH-ubiquinone oxidoreductase (complex I) was slightly poorer than that of ordinary mono-THF acetogenins such as cis-solamin.