Caribenol Queen: A new asymmetric, protecting-group-free synthesis of the marine tetracyclic diterpenoid (+)-caribenol A (1) has been achieved. The enantioselective synthesis employed (S)-methyl 1-methyl-2-oxocyclopent-3-enecarboxylate as a chiral scaffold, and an intramolecular Diels-Alder (IMDA) reaction of substrate 3 afforded the [5.7.6] tricyclic core in compound 2.
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| http://dx.doi.org/10.1002/asia.201300441 | DOI Listing |
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