Journal of thermal analysis

, Volume 31, Issue 1, pp 173–175 | Cite as

Thermal behaviour of 1,3-dimethyl-4-alkylamino-5-nitrosouracils

  • P. Králik
  • T. Gondová
  • L. Štibrányi
Short Communication


The thermally initiated cyclocondensation of 1,3-dimethyl-4-alkylamino-5-nitrosouracils (I), giving rise to the 8-substituted theophyllines (II), was studied by DSC. The corresponding reaction enthalpies were determined for six derivatives of I.


Polymer Physical Chemistry Enthalpy Inorganic Chemistry Theophylline 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    M. M. Barbooti, D. A. Al-Sammerrai and R. M. Al-Ansari, Thermochim. Acta, 79 (1984) 139.Google Scholar
  2. 2.
    H. Masuda, T. Kawarada, K. Myiokawa and I. Masuda, Thermochim. Acta, 63 (1983) 307.Google Scholar
  3. 3.
    D. J. Whelan, R. J. Spear and R. W. Read, Thermochim. Acta, 80 (1984) 149.Google Scholar
  4. 4.
    J. M. Barton, Thermochim. Acta, 71 (1983) 337.Google Scholar
  5. 5.
    C. W. Bird, I. J. Partridge and C. K. Wong, Tetrahedron, 37 (1981) 1011.Google Scholar
  6. 6.
    J. M. Salas-Peregrin, E. Colacio-Rodriguez, M. A. Romero-Molina and M. P. Sanchez-Sanchez, Thermochim. Acta, 69 (1983) 313.Google Scholar
  7. 7.
    M. N. Moreno-Carretero and J. M. Salas-Peregrin, J. Thermal Anal., 29 (1984) 1053.Google Scholar
  8. 8.
    H. Goldner, G. Dietz and E. Carstens, Belg. Patent 616174 (1962), VEB Arzneimittelwerk Dresden.Google Scholar
  9. 9.
    P. Králik, L. Štibrányi, T. Gondová and M. Hirjak, Proc. 8th ICTA Bratislava, Vol. 2, 1985, p. 44.Google Scholar
  10. 10.
    T. Gondová and P. Králik, in preparation.Google Scholar
  11. 11.
    W. E. Brown, D. Dollimore and A. K. Galwey, Comprehensive Chemical Kinetics, Vol. 22, Elsevier, Amsterdam.Google Scholar
  12. 12.
    A. W. Coats and J. P. Redfern, Nature (London), 201 (1964) 68.Google Scholar

Copyright information

© Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest 1986

Authors and Affiliations

  • P. Králik
    • 1
  • T. Gondová
    • 1
  • L. Štibrányi
    • 2
  1. 1.Department of Physical and Analytical ChemistryP. J. Šafarik UniversityKošice
  2. 2.Department of Organic ChemistrySlovak Technical UniversityBratislavaCzechoslovakia

Personalised recommendations