Unified strategy for the synthesis of the "miscellaneous" lycopodium alkaloids: total synthesis of (+/-)-lyconadin A

J Am Chem Soc. 2008 Jun 11;130(23):7222-3. doi: 10.1021/ja8028069. Epub 2008 May 14.

Abstract

Total synthesis of the Lycopodium alkaloid lyconadin A was achieved in 18 steps starting from a readily available vinylogous ester and bromopicoline. The key step in the total synthesis is a proximity-driven oxidative C-N bond-forming reaction that yields the lyconadin pentacycle from a tetracyclic precursor. The key tetracycle, which has been prepared for the first time, is a versatile intermediate that may be utilized for the total synthesis of a variety of Lycopodium alkaloids. Critical to the success of this plan was the efficient preparation of a pyridine-annulated cycloheptadiene tricycle that promises to be a general strategy to access a variety of seven-membered ring containing natural products.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkaloids / chemical synthesis*
  • Polycyclic Compounds / chemical synthesis*

Substances

  • Alkaloids
  • Polycyclic Compounds
  • lyconadin A