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7452337 
Journal Article 
Cyclization reactions of hydrazones, part 31 - Synthesis and study of reactivity of pyrrolo[3,2-e][1,2,4]-triazine system 
Styskala, J; Slouka, Jan; Cankar, P 
2008 
Yes 
Heterocycles
ISSN: 0385-5414 
75 
5 
1087-1095 
English 
WOS:000256851900005 
The corresponding 2-arylhydrazones 5 were obtained by coupling of diazonium salts with diethyl (3-methyl-1H-pyrrole)-2,4-dicarbamate 4. These ones were cyclized in a alkaline medium to ethyl (2-aryl-5-methyl-3-oxo-2,3-dihydro-7H-pyrrolo[3,2-e][1,2,4]triazin-6-yl)carbamates 6 and tested for their stability. The starting carbamate 4 was prepared by a multistep synthesis from diethyl 3-methyl-1H-pyrrole-2,4-dicarboxylate 1. © 2008 The Japan Institute of Heterocyclic Chemistry. 
pyrrolotriazine; azo-hydrazone tautomerism; hydrazono-carbamate; Cyclization reaction 
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