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1H and 13C NMR assignments and conformational analysis of some tetracyclic compounds with a bicyclo[4.2.0]octane ring system

✍ Scribed by Manuel Arnó; M. Luisa Marín; Ramón J. Zaragozá

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
227 KB
Volume
36
Category
Article
ISSN
0749-1581

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✦ Synopsis

This paper reports on the assignment of the 1H and 13C NMR spectra of 14 bicyclo[4.2.0]octane derivatives. Resonance assignments were made on the basis of one-and two-dimensional NMR techniques which included 1H, 13C, DEPT, HMQC and 1HÈ1H COSY and also 1D NOE di †erence spectroscopy. The ratio of the di †erent conformers in the six-membered ring of the bicyclooctane system was determined by molecular mechanics calculations, analysis of proton spinÈspin coupling constants and 13C chemical shifts.

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