1,4-Diazabicyclo[2.2.2]octane-Catalyzed One-Pot Synthesis of Pyrazolo[1,2-<i>a</i>][1,2,4]triazole-1,3-diones under Ultrasound Acceleration
作者:Davood Azarifar、Razieh Nejat-Yami、Mohammad Ali Zolfigol
DOI:10.1002/jhet.1706
日期:2013.11
1,4‐Diazabicyclo[2.2.2]octane has been explored as an efficient catalyst to effect the three‐component condensation reactions between malononitrile, 4‐arylurazoles, and aromatic aldehydes in ethanol underultrasound irradiation conditions. The reactions proceeded very rapidly under mild conditions to furnish the corresponding pyrazolo[1,2‐a][1,2,4]triazole‐1,3‐dione derivatives in excellent yields
1,4-二氮杂双环[2.2.2]辛烷已被研究为在超声辐射条件下在乙醇中实现丙二腈,4-芳基脲和芳香醛之间三组分缩合反应的有效催化剂。反应在温和的条件下进行非常迅速,以优异的产率得到了相应的吡唑并[1,2- a ] [1,2,4]三唑-1,3-二酮衍生物。