A Convenient Method for the Preparation of 2,4,5-triaryl Imidazoles Using Barium Chloride Dispersed on Silica Gel Nanoparticles (BaCl2-nano SiO2) as Heterogeneous Reusable Catalyst
Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>·HM·SO<sub>3</sub>H as a recyclable heterogeneous nanocatalyst for the microwave-promoted synthesis of 2,4,5-trisubstituted imidazoles under solvent free conditions
作者:Hossein Naeimi、Dorsa Aghaseyedkarimi
DOI:10.1039/c5nj01273b
日期:——
synthesis of 2,4,5-trisubstituted imidazoles is achieved through a three component onepotreaction of benzil, benzaldehyde and NH4OAc. This reaction has been catalyzed by Fe3O4@SiO2·HM·SO3H, a very efficient, novel recyclable heterogeneous catalyst, under microwave irradiation and solvent free conditions. The catalyst can be recovered for the subsequent reactions and reused for at least five rounds
A Convenient Method for the Preparation of 2,4,5-triaryl Imidazoles Using Barium Chloride Dispersed on Silica Gel Nanoparticles (BaCl2-nano SiO2) as Heterogeneous Reusable Catalyst
A simple and eco-friendly procedure for the synthesis of 2,4,5-triaryl imidazoles by using Barium chloride
dispersed on silica gel nanoparticles (BaCl2-nano SiO2) as heterogeneous reusable catalyst in high yield under thermal
conditions has been described.
ZrO<sub>2</sub>-β-cyclodextrin catalyzed synthesis of 2,4,5-trisubstituted imidazoles and 1,2-disubstituted benzimidazoles under solvent free conditions and evaluation of their antibacterial study
作者:Yarabhally R. Girish、Kothanahally S. Sharath Kumar、Kuntebommanahalli N. Thimmaiah、Kanchugarakoppal S. Rangappa、Sheena Shashikanth
DOI:10.1039/c5ra13891d
日期:——
A series of 2,4,5-trisubstituted imidazoles and 1,2-disubstituted benzimidazoles catalyzed by ZrO2-supported-β-cyclodextrin (ZrO2-β-CD) under solvent free conditions have been synthesized and characterized by spectral methods.
Ionophore silica-coated magnetite nanoparticles as a recyclable heterogeneous catalyst for one-pot green synthesis of 2,4,5-trisubstituted imidazoles
作者:Hossein Naeimi、Dorsa Aghaseyedkarimi
DOI:10.1039/c5dt03488d
日期:——
Novel multi-SO3H functionalized strong Brønsted acidic ionic liquid coated magnetite nanoparticles have been prepared and applied as catalyst for the synthesis of 2,4,5-trisubstituted imidazoles. The results showed that a novel catalyst was very efficient for the reaction and could be magnetically separated and reused at least 6 times with less reduction in its catalytic activity. Operational simplicity