A series of six 2,5-disubstituted adjacent bis(tetrahydrofuran) stereoisomers with trans/erythro/cis, trans/threo/trans, or cis/threo/cis relative stereochemistry have been synthesized from known dihydroxycyclooctenes via ring opening/cross metathesis and Pd(0)-mediated asymmetric double cycloetherification. The stereochemistry of four of these isomers has been found in the biologically active annonaceous acetogenin natural products. [reaction: see text].

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http://dx.doi.org/10.1021/ol062390lDOI Listing

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  • Annonaceous acetogenins are natural compounds that help fight cancer and have special chemical structures.
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  • The results showed that the method worked well, allowing scientists to tell similar compounds apart and suggesting it could be used for other types of acetogenins too.
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