A Concise Synthesis of Berkelic Acid Inspired by Combining the Natural Products Spicifernin and Pulvilloric Acid
作者:Christopher F. Bender、Francis K. Yoshimoto、Christopher L. Paradise、Jef K. De Brabander
DOI:10.1021/ja905387r
日期:2009.8.19
defined C22 stereochemistry in seven steps and three purifications (24-28% overall yield). A potentially useful anti-selective conjugate propargylation reaction was developed to introduce the vicinal stereodiad. An enantioconvergent synthesis of the other coupling partner, the aromatic precursor to pulvilloric acid methyl ester, was achieved in eight steps and 48% overall yield. The total synthesis of berkelic