Mild preparation of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives with magnetic Fe3O4 nanoparticles coated by (3-aminopropyl)-triethoxysilane as catalyst under ambient and solvent-free conditions
作者:Hamid Reza Shaterian、Majid Mohammadnia
DOI:10.1007/s11164-012-0969-z
日期:2014.1
An efficient, one-pot quantitative procedure for preparation of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives from four-component condensation reaction of hydrazine monohydrate, phthalic anhydride, malononitrile or ethyl cyanoacetate, and aromatic aldehydes in the presence of magnetic Fe3O4 nanoparticles coated by (3-aminopropyl)-triethoxysilane as catalyst under mild, ambient, and solvent-free conditions is described. Simple procedure, high yield, short reaction time, and environmentally benign method are advantages of this protocol. The magnetic Fe3O4 nanoparticles coated by (3-aminopropyl)-triethoxysilane can be recovered and reused several times without loss of activity.
描述了一种高效的一锅法定量制备1H-吡唑并[1,2-b]酞嗪-5,10-二酮衍生物的方法,该方法通过水合肼、邻苯二甲酸酐、丙二腈或氰乙酸乙酯与芳香醛在磁性Fe3O4纳米粒子(表面包覆有(3-氨丙基)-三乙氧基硅烷)催化下进行四组分缩合反应,条件温和、环境、无溶剂。该方案的优点是操作简单、产率高、反应时间短、环境友好。磁性Fe3O4纳米粒子(表面包覆有(3-氨丙基)-三乙氧基硅烷)可回收并重复使用多次而不会丧失活性。