First Stereoselective Total Synthesis and Biological Evaluation of Amphidinin B and Its Analogues

Abstract A highly stereoselective first total synthesis of amphidinin B is described. The key steps involved in this synthesis are the generation of the exo‐double bond in the C1–C9 segment, the Barbier allylation, enzymatic kinetic resolution, and the construction of the C10–C21 segment by Sharpless asymmetric epoxidation, base‐induced epoxide ring‐opening, radical cyclization, diastereoselective reduction of the exo‐cyclic double bond, one‐pot allylation followed by debenzylation, Evans alkylation, and Yamaguchi esterification.