Abstract
By coupling 5-methylpyrazole-3-diazonium chloride with ethyl cyanoacetylcarbamidate, ethyl 5-methyl-3-pyrazolylhydrazonocyanoacetylcarbamidate (1) has been prepared. Alkaline cyclisation of1 yields 2-(5-methyl-3-pyrazolyl)-3.5-dioxo-2.3.4.5-tetrahydro-1.2.4-triazine-6-carbonitrile (2), while thermal cyclisation yields ethyl 4-amino-7-methyl-pyrazolo[3.2-c]-[1.2.4]-triazine-3-carbonyl-carbamidate (3). On further cyclisation of3, 8-methylpyrazolo[3.2-c]pyrimido[4.5-e][1.2.4]-triazine-2.4(1H, 3H)-dione (4) is obtained.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literatur
Mitt.:J. Slouka undP. Peč, Mh. Chem.103, 1444 (1972).
J. Slouka, Mh. Chem.94, 258 (1963).
M. W. Partridge undM. F. G. Stevens, J. Chem. Soc.C 1966, 1127.
M. J. S. Dewar undF. E. King, J. Chem. Soc.1945, 114.
M. R. Atkinson, G. Shaw undR. N. Warrener, J. Chem. Soc.1956, 4118.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Slouka, J., Bekárek, V. & Kubatá, J. Über die Cyclisierung von 5-Methyl-3-pyrazolylhydrazonocyanacetylcarbamidsäureäthylester. Monatshefte für Chemie 105, 535–538 (1974). https://doi.org/10.1007/BF00912605
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00912605