Synthesis 2004(7): 1102-1114  
DOI: 10.1055/s-2004-822340
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York

Stereoselective Total Synthesis of the Natural (+)-Lasonolide A

Sung Ho Kang*a, Suk Youn Kanga, Hyeong-wook Choia, Chul Min Kima, Hyuk-Sang Juna, Joo-Hack Younb
a Center for Molecular Design and Synthesis, Department of Chemistry, School of Molecular Science (BK21), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
Fax: +82(42)8692810; e-Mail: shkang@kaist.ac.kr;
b Department of Chemical Engineering, Sun Moon University, Asan Si, Chung-Nam 336-840, Korea
Further Information

Publication History

Received 5 January 2004
Publication Date:
15 April 2004 (online)

Abstract

The natural (+)-lasonolide A (1), an anti-tumor agent, has been synthesized via thermodynamic benzylidene formation at the C22 quaternary chiral center, use of a disulfone equivalent for elongation of the C15-C17 three-carbon chain as well as introduction of the two trans olefins at C15 and C17, iodocyclization for the upper THP, Michael addition for the bottom THP, and intramolecular Horner-Emmons olefination for the 20-membered macrolactone.