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Complete assignment of the 1H and 13C NMR spectra of the tetraisoprenylated benzophenone 15-epiclusianone

✍ Scribed by M. H. dos Santos; T. J. Nagem; R. Braz-Filho; I. S. Lula; N. L. Speziali

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
171 KB
Volume
39
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

An NMR study of 15‐epiclusianone, 1‐benzoyl‐6‐hydroxy‐14,14‐dimethyl‐3,5,15‐tri(3‐methyl‐2‐butenyl)‐bicyclo[3.3.1]non‐1‐ene‐4,6‐dione (1), a novel tetraisoprenylated benzophenone isolated from pericarp of fruits of Rheedia gardneriana, is described. In addition to conventional 1D NMR techniques, 2D shift‐correlated NMR experiments [^1^H × ^1^H‐COSY, ^1^H × ^13^C‐HMQC‐^1^J(C,H), ^1^H × ^13^C‐HMBC‐^n^J(C,H) (n = 2 and 3) and ^1^H × ^1^H‐NOESY] were used for ^1^H and ^13^C chemical shift assignments of this natural product. The 1D ^13^C NMR spectrum of 1 in the solid state was also obtained. Copyright © 2001 John Wiley & Sons, Ltd.

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