Sulfanilic acid-functionalized silica-coated magnetite nanoparticles as an efficient, reusable and magnetically separable catalyst for the solvent-free synthesis of 1-amido- and 1-aminoalkyl-2-naphthols
作者:H. Moghanian、A. Mobinikhaledi、A. G. Blackman、E. Sarough-Farahani
DOI:10.1039/c4ra03676j
日期:——
Sulfanilic acid-functionalizedsilica-coated nano-Fe3O4 particles (MNPs–PhSO3H) have been prepared as a reusable heterogeneous acid catalyst using a facile process. The catalytic performance of this novel material has been studied in the synthesis of 1-amido- and 1-aminoalkyl-2-naphthol derivatives via a one-pot three-component condensation reaction of aldehydes, 2-naphthol, and amides/urea/amines
磺胺酸官能化的二氧化硅包覆的纳米Fe 3 O 4颗粒(MNPs–PhSO 3 H)已使用简便的方法制备为可重复使用的多相酸催化剂。该新型材料的催化性能已在通过以下方法合成1-氨基和1-氨基烷基-2-萘酚衍生物中进行了研究在无溶剂的经典加热条件下,醛,2-萘酚和酰胺/脲/胺的一锅三组分缩合反应,收率好至极好。在外部磁场的帮助下,催化剂很容易从反应混合物中分离出来,并在不明显降低催化效率的情况下重复使用几次。从透射电子显微镜(TEM),扫描电子显微镜(SEM),粉末X射线衍射(XRD)和样品磁强计(VSM)获得的结果表明,合成的磁性纳米复合材料是超顺磁性的,尺寸范围为15–30 nm。
A Simple and Efficient Procedure for the Synthesis of Amidoalkyl Naphthols by <i>p</i>-TSA in Solution or under Solvent-Free Conditions
An efficient and direct procedure for the synthesis of amidoalkyl naphthols has been described that employs a three-component condensation reaction in one pot using aromatic aldehydes, β-naphthol and ureas or amides in the presence of p-toluene sulfonic acid in 1,2-dichloroethane at room temperature or undersolvent-freeconditions at elevated temperature.
Cation‐Exchanged Resins: Efficient Heterogeneous Catalysts for Facile Synthesis of 1‐Amidoalkyl‐2‐naphthols from One‐Pot, Three‐Component Condensations of Amides/Ureas, Aldehydes, and 2‐Naphthol
作者:Sachin B. Patil、Pankajkumar R. Singh、Mandar P. Surpur、Shriniwas D. Samant
DOI:10.1080/00397910701263858
日期:2007.5.1
Abstract One‐pot, three‐component condensation of 2‐naphthol, amides/ureas, and aldehydes takes place smoothly in the presence of cation‐exchange resins to afford the corresponding 1‐amidoalkyl‐2‐naphthols in good yield. Indion‐130 is found to be the best catalyst for the reaction and is recyclable. The method is simple, solvent free, and involves a short reaction time.
Silica gel-supported polyphosphoric acid (PPA-SiO2) was found to be an efficient catalyst for the multicomponent condensation reaction of aryl aldehydes, 2-naphthol, and urea or amides to afford the corresponding 1-amidoalkyl-2-naphthols in good to excellent yields. This new approach consistently had short reaction times, high conversions, clean reaction profiles, and simple experimental and workup procedures.
Synthesis of amidoalkyl naphthols by an iodine-catalyzed multicomponent reaction of β-naphthol
作者:Rahul R. Nagawade、Devanand B. Shinde
DOI:10.1016/j.mencom.2007.09.018
日期:2007.9
Iodine is an efficient catalyst for the multicomponent condensation reaction of beta-naphthol, aromatic aldehydes and urea or an amide to afford the corresponding amidoalkyl naphthols in good yields.