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NMR spectral assignment and conformation of macrocyclic biaryl ethers from Garuga gamblei
Author(s) -
Kalchhauser H.,
Krishnamurty H. G.
Publication year - 1989
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.1260270706
Subject(s) - chemistry , intramolecular force , nmr spectra database , coupling constant , proton nmr , carbon 13 nmr satellite , base (topology) , spectral line , carbon 13 nmr , biphenyl , stereochemistry , computational chemistry , nuclear magnetic resonance spectroscopy , fluorine 19 nmr , organic chemistry , mathematical analysis , physics , mathematics , particle physics , astronomy
The assignment of the 1 H and 13 C NMR spectra of macrocyclic biphenyl ethers isolated from Garuga gamblei King was performed by 2D NMR techniques. An erroneous assignment given in the literature for one of the compounds was corrected. The use of shift increment systems and a 13 C NMR data base demonstrated the applicability of these methods even in the case of very unusual structural elements. The conformation of the compounds in solution is discussed with the help of arguments derived from coupling constants and intramolecular anisotropy effects.