essential for activity. An aryl group is a good replacement for the olefin. The totalsynthesis of structurally simplified C11-deoxypsymberin (29) was completed, and its activity is consistently more potent than the natural product which provides a unique opportunity for further SAR studies in the psymberin and pederin family. Preliminary mechanism studies suggest the mode of action of psymberin is
showcased in the preparation of advanced psymberin analogues. The biological data of these analogues are presented. 1 Introduction 2 Methodology Development 3 TotalSynthesis of Psymberin 4 Synthesis of Psymberin Analogues: The Discovery of C11-Deoxypsymberin 5 Conclusion (diacetoxyiodo)benzene - psymberin - oxidative cyclization - totalsynthesis - antitumor