
doi: 10.1021/ol101141a
pmid: 20550217
The originally proposed biosynthesis of (+)-symbioimine was explored, resulting in the successful intramolecular Diels-Alder (IMDA) cyclization of an appropriate (E,E,E)-1,7,9-decatrien-3-one. In contrast to the originally proposed biosynthesis, the IMDA reaction appears to proceed via an endo transition state. Remarkably, a single exocyclic stereogenic center effectively controls the pi-facial selectivity affording a highly diastereoselective cycloaddition.
Stereoisomerism, Alkenes, Ketones, Heterocyclic Compounds, 3-Ring, Substrate Specificity
Stereoisomerism, Alkenes, Ketones, Heterocyclic Compounds, 3-Ring, Substrate Specificity
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