Synthesis of three marine natural sesterterpenolides from methyl isoanticopalate. First enantioselective synthesis of luffolide.

@article{Basabe2005SynthesisOT,
  title={Synthesis of three marine natural sesterterpenolides from methyl isoanticopalate. First enantioselective synthesis of luffolide.},
  author={Pilar Basabe and Santiago Delgado and Isidro S. Marcos and David D{\'i}ez and Alejandro Diego and M{\'o}nica de Rom{\'a}n and Julio G Urones},
  journal={The Journal of organic chemistry},
  year={2005},
  volume={70 23},
  pages={9480-5}
}
[Reaction: see text]. The synthesis of three marine sponge metabolites, luffolide (4), 5, and 6, are described for the first time, establishing the absolute configuration of these compounds. The key intermediate, aldehyde 17, was obtained from methyl isoanticopalate, 11. The addition of 3-furyllithium to 17 and subsequent photochemical oxidation give the gamma-hydroxybutenolide 5 and its epimer at C-16. Sesterterpenolide 6 is obtained by dehydration of 5. From the key aldehyde 17, luffolide (4… CONTINUE READING

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