Total Synthesis of the Antiparasitic Agent Avermectin B1a
作者:James D. White、Gary L. Bolton、Anura P. Dantanarayana、Christina M. J. Fox、Roger N. Hiner、Randy W. Jackson、Kazuhiko Sakuma、Ulhas S. Warrier
DOI:10.1021/ja00112a006
日期:1995.2
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.
A synthetic route to the hexahydrobenzofuran nucleus of avermectins via diazoketone cyclization
作者:James D. White、Anura P. Dantanarayana
DOI:10.1016/s0040-4039(00)96876-x
日期:1987.1
A hexahydrobenzo[AB]furan characteristic of the avermectins and certain milbemycins was synthesized via acid-catalyzed intramolecular addition of a diazoketone to a γ-lactone; subsequent transformations led to structures containing much of the functionality and stereochemistry present in the corresponding segments of these macrolides.