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RISSynthesis and Spectral Characteristics of Nove lFluorescentDyes Based on Pyrimido[4,5-d ][1, 2,4 ]triazolo[4,3-a ]pyrimidine
Different derivativesofanovel heterocyclic system, i.e. ,pyrimido[4,5-d ][1, 2,4 ]triazolo[4,3-a ]pyrimidine, are synthesized in moderate-to-good yields.These compounds exhibit excellent photochromism upon photoirradiation. Th ephotophysical...
Synthesis of new derivatives of [1,2,3]triazolo[4,5-d][1,2,4]triazolo[4,3-a]pyrimidine
solvents and normal heating conditions with simple work-up procedures.
Keywords: [1,2,3]triazolo[4,5-d][1,2,4]triazolo[4,3-a]pyrimidine; heterocyclization; alkylation; diazotization.
References
[1] Beyer C. F., Zhang N., Hernandez R...
Regioselective synthesis of new 5H,10H-dipyrimido[2,1-b:4\\\\\\',5\\\\\\'-d][1,3]thiazine as a novel heterocyclic system
for the synthesis of new fused dipyrimido[2,1-b:4\\\\\\',5\\\\\\'-d][1,3]thiazines as a novel heterocyclic system. In addition, we present our findings on the regiochemistry of the reaction by performing x-ray analysis....
Synthesis of 1,2,4-Triazolo[1,5-d]-1,2,4-triazine-5-thiones
In an attempt to discover bicyclic compounds containing the 1,2,4-triazine moiety, 1,2,4-triazolo[1,5-d]-1,2,4-triazine-5-thiones from one pot reaction of arylnitriles with 4-amino-1,2,4-triazine-3-thione-5-one in the presence of potassium tert...
Synthesis and density functional theory study of [1,2,3]triazolo[4,5-d][1,2,4] triazolo[4,3-a]pyrimidine derivatives: A novel heterocyclic system
Several 3H-[1,2,3]triazolo[4,5-d][1,2,4]triazolo[4,3-a]pyrimidine derivatives of a novel ring system have been synthesised. The initial substitution of the 4-Cl function of 2,4-dichloro-6-methylpyrimidin-5-amine with benzylamine followed...