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DOI: 10.1055/s-0029-1218806
Connecting C19 Norditerpenoids to C20 Diterpenes: Total Syntheses of 6-Hydroxy-5,6-dehydrosugiol, 6-Hydroxysugiol, and Taiwaniaquinone H, and Formal Synthesis of Dichroanone
Publikationsverlauf
Publikationsdatum:
28. Mai 2010 (online)

Abstract
Oxidation of the B-ring of abietane derivatives by Sharpless dihydroxylation gave the natural products 6-hydroxy-5,6-dehydrosugiol and 6-hydroxysugiol. Moreover, further oxidation gave a hydroxy dione derivative that provides a synthetic entry into the C19 taiwaniaquinoid family of natural products. This route is based on biosynthetic considerations and involves a benzilic acid rearrangement followed by decarboxylation. On the basis of this approach, a total synthesis of (-)-taiwaniaquinone H and a formal synthesis of (-)-dichroanone have been achieved.
Key words
terpenoids - biomimetic synthesis - biosynthesis - oxidations - stereoselective synthesis - total synthesis
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