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A revised structure for plumbazeylanone

โœ Scribed by G.M.Kamal B. Gunaherath; A.A.Leslie Gunatilaka; Philip J. Cox; R.Alan Howie; Ronald H. Thomson


Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
88 KB
Volume
29
Category
Article
ISSN
0040-4039

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โœฆ Synopsis


The structure of plumbazeylanone has been revised, by X-ray crystallography, to 1,2,3,4-tetrahydro-5-hydroxy-l,4-diketo-2-methyl-2,3-di(5'-hydroxy-2'-methyl-l,4-naphthoquinon-3'-yl)naphthalene.


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while the 13C spectrum provides additional evidence for two quinonoid (190.0, 184.1) and four ketonic (202.7, 196.3, 189.7, 183.6) carbonyl groups. Olefinic protons are absent but evidently a methylene bridge is present probably derived, as in zeylanone (A), from the methyl group of one of the plumb