M. Arias-Pérez, A. Alejo, E. Gálvez
Apr 1, 1995
Citations
0
Influential Citations
9
Citations
Journal
Journal of Molecular Structure
Abstract
Abstract Ethyl 3-methyl-9-oxo-3-azabicyclo[3.3.1]nonane-1-carboxylate has been studied by 1 H, 13 C and 2D NMR spectroscopy in order to establish its conformational behaviour. The combined use of COSY and 1 H- 13 C correlation spectra helped in the unambiguous and complete assignment of the bicyclic carbon and proton resonances. It is found that the piperidone ring displays a slightly fattened chair conformation with the N-methyl group in the equatorial position, while a twist-chair form seems to be favoured for the cyclohexanone one. Two preferred orientations migth be proposed for the ethoxycarbonyl moiety.