Preparation and characterization of Fe3O4@SiO2@PMA:AS an efficient and recyclable nanocatalyst for the synthesis of 1-amidoalkyl-2-naphthols
作者:Mohsen Esmaeilpour、Jaber Javidi、Maryam Zandi
DOI:10.1016/j.materresbull.2014.04.019
日期:2014.7
superparamagnetic Fe 3 O 4 @SiO 2 that is synthesized based on several stages. First of all, the Fe 3 O 4 @SiO 2 nanosphere core-shell is synthesized. Then, H 3 PMo 12 O 40 nanoparticles were synthesized by the treatment of H 3 PMo 12 O 40 with n -Octane as solvent by a solvothermal method and this nano hetero polyacid immobilized onto the imidazole functionalized Fe 3 O 4 @SiO 2 nanoparticles. The
摘要 在本文中,我们报道了一种基于多个阶段合成的功能化超顺磁性 Fe 3 O 4 @SiO 2 的制备方法。首先,合成了Fe 3 O 4 @SiO 2 纳米球核壳。然后,通过溶剂热法用正辛烷作为溶剂处理H 3 PMo 12 O 40 合成H 3 PMo 12 O 40 纳米颗粒,并将该纳米杂多酸固定在咪唑官能化的Fe 3 O 4 @SiO 2 纳米颗粒上。样品的结构通过XRD、TEM、DLS、FE-SEM、FT-IR、N 2 吸附-解吸等温线分析和VSM表征。此外,还描述了一种使用 β-萘酚、醛和乙酰胺的多组分、一锅缩合反应制备酰胺烷基萘酚的有效和直接的方案,在无溶剂和微波条件下,在 Fe 3 O 4 @SiO 2 -imid-PMA n 存在下苯甲酰胺和尿素。此外,纳米催化剂可以很容易地通过磁场回收并在接下来的反应中重复使用至少 5 次,而不会明显降低催化活性。
Eco-friendly and efficient multi-component method for preparation of 1-amidoalkyl-2-naphthols under solvent-free conditions by dodecylphosphonic acid (DPA)
作者:Maryam Zandi、Ali Reza Sardarian
DOI:10.1016/j.crci.2011.11.012
日期:2012.4
Résumé An efficient and direct eco-friendly protocol for the preparation of 1-amidoalkyl-2-naphthols employing a multi-component, one-pot condensation reaction between β-naphthol, aromatic or aliphatic aldehydes and benzamide or acetamide in the presence of dodecylphosphonic acid under solvent-free conditions has been described.
A novel inorganic–organic nanohybrid material H<sub>4</sub>SiW<sub>12</sub>O<sub>40</sub>/pyridino-MCM-41 as efficient catalyst for the preparation of 1-amidoalkyl-2-naphthols under solvent-free conditions
作者:R. Tayebee、M. M. Amini、M. Akbari、A. Aliakbari
DOI:10.1039/c5dt00368g
日期:——
A new inorganic–organic nanohybrid material was prepared and performed as an efficient catalyst for the one-pot multi-component synthesis of different substituted 1-amidoalkyl-2-naphthols under solvent-free conditions.
Zirconyl triflate as an efficient and reusable catalyst for one-pot synthesis of 1-amidoalkyl-2-naphthols under solvent-free conditions
作者:Hajar Hashemi、Ali Reza Sardarian
DOI:10.1007/s13738-012-0208-y
日期:2013.8
In the present work, the preparation of 1-amidoalkyl-2-naphthols via one-pot three-component condensation of amides, aldehydes, and β-naphthol in the presence of catalytic amounts of zirconyl triflate, as a highly efficient, low toxic, stable and non-hygroscopic catalyst undersolvent-freeconditions is reported. This low-cost procedure offers several other advantages such as short reaction times and
Preparation and characterization of a novel Wells–Dawson heteropolyacid-based magnetic inorganic–organic nanohybrid catalyst H<sub>6</sub>P<sub>2</sub>W<sub>18</sub>O<sub>62</sub>/pyridino-Fe<sub>3</sub>O<sub>4</sub>for the efficient synthesis of 1-amidoalkyl-2-naphthols under solvent-free conditions
作者:Reza Tayebee、Mostafa M. Amini、Hooriyeh Rostamian、Azam Aliakbari
DOI:10.1039/c3dt51594j
日期:——
A novel magnetic inorganicâorganic nanohybrid material H6P2W18O62/pyridino-Fe3O4 (HPA/TPI-Fe3O4) was fabricated and performed as an efficient, eco-friendly, and highly recyclable catalyst for the solvent-free, one-pot, and multi-component synthesis of various substituted 1-amidoalkyl-2-naphthols from the reaction of β-naphthol, an aldehyde, and benzamide with good to excellent yields (47â94%) and in a short span of time (25â60 min). The nanohybrid catalyst was prepared by the chemical anchoring of WellsâDawson heteropolyacid H6P2W18O62 onto the surface of modified Fe3O4 nanoparticles with N-[3-(triethoxysilyl)propyl]isonicotinamide (TPI) linker. The magnetically recoverable catalyst was easily recycled at least eight times without any loss of catalytic activity. XRD, TEM, UV-vis, and FTIR confirmed that the heteropolyacid H6P2W18O62 is well dispersed on the surface of the solid support and its structure is retained after immobilization on the pyridine modified Fe3O4 nanoparticles. This protocol is developed as a safe and convenient alternate method for the synthesis of 1-amidoalkyl-2-naphthols utilizing an eco-friendly, and a highly reusable catalyst.