An approach to the BCDE ring of quasimarin
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1982-10-01
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Abstract
A 10-step route to the BCDE ring system of quasimarin (1) is described. Key features of the route include the regioselective protection of diketone 7 by use of intramolecular ketal formation, a two-step lactone to ether reduction, and a regioselective lactonization. The tetracyclic system 15 is produced in 29% overall yield.
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Reprinted (adapted) with permission from The Journal of Organic Chemistry, 47(22); 4271-4274. Doi: 10.1021/jo00143a020. Copyright 1982 American Chemical Society.
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Fri Jan 01 00:00:00 UTC 1982