Journal
TETRAHEDRON LETTERS
Volume 49, Issue 6, Pages 1021-1025Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.12.003
Keywords
Lasalocid; polyether antibiotics; biosynthesis; trisubstituted olefin; aldol coupling
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In the biosynthesis of a polyether ionophore antibiotic, lasalocid A, the cyclic ether skeleton composed of a tetrahydrofuran linked to a tetrahydropyran could be constructed by oxidative cyclization of linear dodecaketide diene precursor. Hence, we hypothesized a prelasalocid having (E,E)-trisubstituted olefins as the dodecaketide biosynthetic precursor. A stereo-controlled synthetic route to the prelasalocid has been devised in a highly convergent manner entailing installation of a variety of substituents at the trisubstituted olefins. (c) 2007 Elsevier Ltd. All rights reserved.
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