Iron-based metal–organic framework, Fe(BTC): an effective dual-functional catalyst for oxidative cyclization of bisnaphthols and tandem synthesis of quinazolin-4(3H)-ones
An iron-basedmetal–organicframework [Fe(BTC) (BTC: 1,3,5-benzenetricarboxylate)] has been shown to be an active and heterogeneous catalyst for both oxidative cyclization of methylenebisnaphthols and a modern tandem process (an in situ oxidation-aminal formation-oxidation sequence). Such a potential catalytic utility of Fe(BTC) makes it quite attractive for sustainable industrial chemistry.
Green and diasteroselective oxidative cyclization of bisnaphthols to spirans
作者:A. Alizadeh、M. M. Khodaei、K. H. Moradi
DOI:10.1007/bf03246020
日期:2010.6
Hydrogen peroxide/MoO3, as an efficient and clean oxidizing system was used to afford diasteroselective oxidative cyclization of bisnaphthols to spirans in ethanol at 60 °C with high yields. Bisnaphthols were prepared by the reaction of a series of aldehydes and 2-naphthol in the presence of a catalytic amount of H3[P(Mo3O10)4].nH2O (HPa) in refluxing dichloromethane.
Abstract Aerial oxidative cyclization of bisnaphthols to their corresponding mixture of two isomeric spirans 3 and 4 has been carried out using a catalytic amount of magnetic core-shell nanoparticle-supported TEMPO (MNST) combined with a small amount of FeCl 3 ·6H 2 O. This catalytic system consistently has the advantages of moderate to good yields, low reaction times, mild and convenient conditions
摘要 使用催化量的磁性核壳纳米粒子负载的 TEMPO (MNST) 结合少量 FeCl 3 ·6H 2 O 进行了双萘酚的空气氧化环化为其相应的两种异构体螺环 3 和 4 的混合物。该催化体系始终具有中等至良好收率、反应时间短、条件温和方便、实验和后处理程序简单、环境友好和高度经济等优点。磁性可分离的 MNST 催化剂使其可以多次回收和再循环而不会显着损失活性。