1146953-49-2Relevant academic research and scientific papers
H2SO4/Silica gel: An efficient and reusable heterogeneous catalyst for the synthesis of pyrazolo[4,3-e][1,2,4]triazolo[4,3- c]pyrimidines
Davoodnia
experimental part, p. 1595 - 1598 (2012/04/10)
Sulfuric acid adsorbed on silica gel has been used as an effective and reusable catalyst for the synthesis of pyrazolo[4,3-e][1,2,4]triazolo-[4,3-c] pyrimidines through cyclocondensation of 4-hydrazino-1Hpyrazolo[3,4-d] pyrimidines with triethylorthoesters under conventional heating and solvent-free microwave irradiation conditions. The present methodology offers several advantages, such as high yields, short reaction times, mild reaction condition and a recyclable and relatively green catalyst with easy work up.
Synthesis of pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines
Davoodnia, Abolghasem,Zhiani, Rahele,Tavakoli-Hoseini, Niloofar
experimental part, p. 1405 - 1407 (2009/12/05)
Starting from 1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-ones, a synthesis pathway to the tricyclic pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines is described. Reaction of 1,5-dihydro-4H-pyrazolo[3,4-d] pyrimidin-4-ones with phosphoryl chloride afforded
