obtained and characterized by X-ray diffraction analysis, spectral and physicochemical methods. The features of the enantiomers of the considered compounds are analysed by quantum chemistry methods and crystal packing modeling methods. It is shown that intermolecular interactions in solid state radically change the nature of the conformationalstructure of 1,5-diazabicyclo[3.1.0]hexanes.
A new method was developed for the synthesis of 6-substituted 1,5-diazabicyclo[3.1.0]hexanes and 7-substituted 1,6-diazabicyclo[4.1.0]heptanes by condensation of N-monohalotrimethylene- and N-monohalotetramethylenediamines with carbonyl compounds in the presence of bases. X-ray diffraction studies and quantum-chemical B3LYP/6-31G* calculations demonstrated that the conformations of the resulting bicyclic systems are stabilized by stereoelectronic interactions. As a result, a boat conformation prevails in 1,5-diazabicyclo[3. 1.0]hexanes, whereas the energies of chair, half-chair, and boat conformations of 1,6-diazabicyclo[4.1.0]heptanes are equalized.
6,6′-Bis(1,5-diazabicyclo[3.1.0]hexane)
作者:V. V. Kuznetsov、N. N. Makhova、M. O. Dekaprilevich
DOI:10.1007/bf02496194
日期:1999.3
The interaction of 1,3-diaminopropane with glyoxal and NaOCl in water at pH 9.5-10.5 afforded the previously unknown 6,6'-bis(1,5-diazabicyclo[3.1.0]hexane). According to X-ray diffraction data, both bicyclic fragments of the title compound adopt a boat conformation.