TOTAL SYNTHESIS OF THE ANTIPARASITIC AGENT AVERMECTIN B-1A

摘要

The synthesis of avermectin B-1a has been completed by a route that assembles the aglycon from three subunits consisting of the hexahydrobenzofuran moiety (A), the spiroketal segment (B), and the acyclic portion (C) comprising C9-C15. Connection is made in a B + C --> (B - C) + A sequence, and the synthesis is concluded by attachment to the aglycon of the L-oleandrosyl-L-oleandrose disaccharide via the pyridylthio glycoside. [References: 93]