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    STUDIA CHEMIA - Issue no. 1 / 2006  
         
  Article:   SYNTHESIS AND STRUCTURAL ANALYSIS OF SOME NEW PRECURSORS OF MACROCYCLIC CYCLOPHANES: 1,4-BIS (2-R-5-R1-1,3-DIOXAN-2-YL) BENZENE DERIVATIVES.

Authors:  NICULINA BOGDAN, ANDREI ŞERBAN GÂZ, FLAVIA POP, ELENA BOGDAN, ANAMARIA TEREC, LUMINIŢA DAVID, ION GROSU.
 
       
         
  Abstract:  The synthesis and the stereochemistry of some new 2,5-substituted-1,3-dioxane derivatives of 1,4-diacetylbenzene are reported. The structural analysis carried out using NMR investigations revealed the anancomeric structure of the compounds and the cis or/and trans disposition of the substituents. These experiments showed the favorable arrangement of the different functions for the participation to the macrocyclisation reactions insured by the axial orthogonal disposition of the aromatic group with respect to both 1,3-dioxane rings.  
         
     
         
         
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