Design and synthesis of nickel tetra‐2,3‐pyridiniumporphyrazinato trinitromethanide as an influential catalyst and its application in the synthesis of 1,2,4-triazolo based compounds
facile and benign syntheses of [1,2,4]triazolo[5,1-b]quinazolines and [1,2,4]triazolo[1,5-b]pyrimidines were studied using novel nickel tetra‐2,3‐pyridiniumporphyrazinato trinitromethanide [Ni(TPPAH)][C(NO2)3]4 as an efficient catalyst. The desired products were synthesized under solvent-free conditions using 10 mg of [Ni(TPPAH)][C(NO2)3]4 as a catalyst at 80 °C. The morphology and structure of [Ni(TPPAH)][C(NO2)3]4
An Expeditious Synthesis of Tetrahydro-1,2,4-triazolo[5,1-<i>b</i>]quinazolin-8(4<i>H</i>)-ones and Dihydro-1,2,4-triazolo[1,5-<i>a</i>]pyrimidines
作者:Kumkum Kumari、D. S. Raghuvanshi、Krishna Nand Singh
DOI:10.1080/00304948.2012.715062
日期:2012.1
([Bmim]BF4) in the synthesis of tetrahydro1,2,4-triazolo[5,1-b]quinazolin-8(4H)-ones and dihydro-1,2,4-triazolo[1,5-a]pyrimidines. Although different strategies have been employed for the synthesis of these compounds,14–18 these methods suffer from drawbacks such as long reaction times, cumbersome isolation of the products and harsh reaction conditions. We now report a facile and efficient ionic liquid-catalyzed