Magnetic Nanoparticle Immobilized N-Propylsulfamic Acid as a Recyclable and Efficient Nanocatalyst for the Synthesis of 2H-indazolo[2,1-b]phthalazine-triones in Solvent-Free Conditions: Comparison with Sulfamic Acid
作者:Amin Rostami、Bahman Tahmasbi、Ako Yari
DOI:10.5012/bkcs.2013.34.5.1521
日期:2013.5.20
N-Propylsulfamic acid supported onto magnetic $Fe_3O_4$ nanoparticles (MNPs-PSA) was used as an efficient and magnetically recoverable catalyst for synthesis of 2H-Indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives from the three-component, one-pot condensation reaction of phthalhydrazide, aromatic aldehydes and cyclic 1,3-diones, in good to excellent yields at $100^\circ}C$ under solvent-free conditions. The catalyst was easily separated with the assistance of an external magnetic field from the reaction mixture and reused for several consecutive runs without significant loss of its catalytic efficiency. In order to compare, the synthesis of 2H-Indazolo[ 2,1-b]phthalazine-1,6,11(13H)-trione derivatives in the presence of catalytic amount of sulfamic acid (SA) under same reaction condition was also reported.
负载在磁性$Fe_3O_4$纳米颗粒上的N-丙基磺酸胺(MNPs-PSA)被用作一种高效且可磁性回收的催化剂,用于从酞酰肼、芳香醛和环状1,3-二酮的三组分一锅法缩合反应中合成2H-吲唑[2,1-b]酞嗪-1,6,11(13H)-三酮衍生物,在无溶剂条件下于$100^\circ}C$下得到良好至优异的产率。催化剂借助外部磁场轻松地从反应混合物中分离出来,并在连续多次循环使用中保持其催化效率无显著损失。为了进行比较,同样反应条件下使用硫酸胺(SA)催化量的2H-吲唑[2,1-b]酞嗪-1,6,11(13H)-三酮衍生物的合成也进行了报道。