+++3 статьи, спасибо!

[SergSam]

Прошу помочь

1) Journal of Heterocyclic Chemistry
Synthesis and structure of heterocyclic compounds. 1-Amino-2,4-Disubstituted imidazoles
Giovanni Cerioni, Maria Teresa Cocco, Cenzo Congiu, Antonio Maccioni, Volume 18 Issue 7 , Pages 1379-1382 (November 1981)

DOI:

http://dx.doi.org/10.1002/jhet.5570180720

2) Liebigs Annalen der Chemie
Synthese von 1,2,4-Triazinen, XV. Synthese von 1,2,4-Triazin-6(1H)-onen
Hans Neunhoeffer, Birgit Klein-Cullmann, Volume 1992 Issue 12 , Pages 1271-1274 (22. December 1992)

DOI:

http://dx.doi.org/10.1002/jlac.1992199201210

3) Heterocycles
Structural Revision in Pyrazole Chemistry
Devinder Kumar and Shiv P. Singh, Vol 63, Issue 1, 2004, pp.145-173,

DOI:

http://dx.doi.org/10.3987/REV-03-569

[nikolay_ap]

2

[sergio147]

1

[Demcha]

3