Structure and conformation of heterocycles. X. On 1,4,5,8‐tetraazadecalins

Benzion Fuchs*, Aviyakar Ellencweig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A synthetic, structural and conformational study of 1,4,5,8‐tetraazadecalin (3) and several of its new, substituted derivatives was performed. Mass‐spectrometric and NMR‐spectroscopic data were taken to indicate a trans‐fused double chair in most cases. These findings, juxtaposed to the notorious elusiveness of trans‐1,4,5,8‐tetraoxadecalin (2) were rationalized in terms of a “reverse anomeric effect”. Substituent effects were also assessed: substituents in the two angular positions or on all four nitrogens preclude trans fusion in favour of the isomeric cis‐ and/or biimidazolidin‐2‐yl structures. The cis‐geometry also prevails in systems were it is imposed by bridging substituents.

Original languageEnglish
Pages (from-to)326-333
Number of pages8
JournalRecueil des Travaux Chimiques des Pays‐Bas
Issue number5
StatePublished - 1979


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