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Synthesis 2004(7): 1102-1114
DOI: 10.1055/s-2004-822340
DOI: 10.1055/s-2004-822340
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York
Stereoselective Total Synthesis of the Natural (+)-Lasonolide A
Further Information
Received
5 January 2004
Publication Date:
15 April 2004 (online)
Publication History
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.
Key words
asymmetric synthesis - diastereomeric differentiation - macrocyclization - natural products - total synthesis
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