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Complete assignment of the 1 H and 13 C NMR spectra of the tetraisoprenylated benzophenone 15‐epiclusianone
Author(s) -
dos Santos M. H.,
Nagem T. J.,
BrazFilho R.,
Lula I. S.,
Speziali N. L.
Publication year - 2001
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.795
Subject(s) - benzophenone , chemistry , carbon 13 nmr , nmr spectra database , two dimensional nuclear magnetic resonance spectroscopy , nuclear magnetic resonance spectroscopy , chemical shift , carbon 13 nmr satellite , proton nmr , stereochemistry , spectral line , fluorine 19 nmr , organic chemistry , physics , astronomy
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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