Abstract
Efficient synthesis of the partial structure of marine toxin 13-desMe spirolide C was achieved via the selective Diels-Alder reaction and C-C bond formation with the use of a silatrane substituent and the subsequent facile formation of a γ-butenolide ring. The comparison of NMR data between the synthesized diastereomers and the natural product strongly suggested that the relative configuration at the C4 position was S configuration with respect to the 7,6-spirocycle.
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