Studies in the synthesis of C‐ring bridged morphinans 3—13C NMR analysis of some simple and complex bicyclooctane derivatives

Victoria F. Roche, Donald L. Nagel, Edward B. Roche

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2 Scopus citations

Abstract

The 13C NMR spectra of eight novel derivatives of bicyclo[2.2.2]‐ and ‐[3.2.1]octane have been recorded and analysed. These compounds were isolated and characterized as intermediates in the synthesis of a unique derivative of 1,2,3,3a,11b,11c‐hexahydroaporphine. Carbon chemical shift assignments of the molecules under investigation were based on 13C NMR theory including splitting patterns, differences in chemical shift values of carbons α and β to amino nitrogens in their protonated and non‐protonated forms, and through the anticipated shielding effects of γ‐syn and γ‐anti heteroatoms. This latter method of analysis was particularly useful in assigning the chemical shift values of carbons in the bicyclooctane region of the simpler molecules.

Original languageEnglish (US)
Pages (from-to)759-766
Number of pages8
JournalMagnetic Resonance in Chemistry
Volume23
Issue number9
DOIs
StatePublished - 1985

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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