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.
Herein, a green and efficient heterogeneous and photocatalytic system for the oxidation of bisnaphthols in acetonitrile under light-emitting diode will be presented. In this reaction, aerial oxygen and H2O2 have been used as oxidant in the presence of copper ferrite nanoparticles and N-hydroxyphthalimide as an organic co-catalyst. Copper ferrite nanoparticles were magnetically separated, the efficiency
在此,将展示一种绿色高效的多相光催化系统,用于在发光二极管下氧化乙腈中的双萘酚。在该反应中,在铁氧体铜纳米粒子和作为有机助催化剂的N-羟基邻苯二甲酰亚胺存在下,空气氧和H 2 O 2被用作氧化剂。铁氧体铜纳米粒子被磁性分离,其效率在五个周期内几乎保持不变。采用溶胶-凝胶法合成了磁性铁氧体铜纳米粒子,并通过XRD、FT-IR、SEM、TEM、VSM和DRS分析对其进行了表征。在该项目中,形成了两组非对映异构体。 图形概要 双萘酚氧化的催化体系。
Kasturi, T. R.; Kumar, K. Ajay, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1995, vol. 34, # 1, p. 6 - 11