We report an efficient and entirely green procedure for preparation of 1-(benzothiazolylamino)methyl-2-naphthol derivatives involving multi-component, one-pot condensation reaction of 2-naphthol, 2-aminobenzothiazole, and aromatic aldehydes in the presence of maltose under solvent-free conditions. This method has several advantages, including mild conditions, high yields, clean reaction profile, simple operation, and environmentally benign and simple work-up procedures.
Production, characterization, and application of a novel chitosan-g-maleic anhydride and modified graphene oxide nanocomposite, supported methane sulfonic acid, for efficient synthesis of 1-(benzothiazolylamino) methyl-2-naphtols
this paper to fabricate 1-(benzothiazolylamino) methyl-2-naphthols using a novel green nanocomposite of chitosan and diethylenetriamine-modified grapheneoxide, supported methanesulfonic acid (Ch@GO-DETA.MSA.). For the synthesis of the nanocomposite, maleic anhydride was first attached to chitosan, and then, grapheneoxide was modified by diethylenetriamine (GO@DETA). Subsequently, nanocomposite was
AbstractOne-pot, efficient three-component condensation of aromatic aldehydes, 2-naphthol and 2-aminobenzothiazole in the presence of oxalic acid as an organocatalyst and effective catalyst for the synthesis of 1-(benzothiazolylamino) methyl-2-naphthol derivatives under thermal and solvent-free conditions is described. The present approach of this methodology offers several advantages such as high
Fe<sub>3</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
-ZrCl<sub>2</sub>
-MNPs: A novel magnetic catalyst for the clean and efficient cascade synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives in the absence of solvent
作者:Fatemeh Kamali、Farhad Shirini
DOI:10.1002/aoc.3972
日期:2018.1
A green, simple and eco‐friendly three‐component condensation for the synthesis of 1‐(benzothiazolylamino)methyl‐2‐naphthols using new magnetic nanoparticles formulated as Fe3O4@SiO2–ZrCl2‐MNPs is described. Considering the economic and environmental aspects, the method provides some advantages such as clean procedure, solvent‐free conditions, simple operation and work‐up, relatively short reaction
描述了一种绿色,简单且环保的三组分缩合反应,该反应使用新的磁性纳米颗粒Fe 3 O 4 @SiO 2 -ZrCl 2 -MNPs合成1-(苯并噻唑基氨基)甲基-2-萘酚。考虑到经济和环境方面,该方法具有一些优点,例如清洁程序,无溶剂条件,简单的操作和后处理,相对较短的反应时间和较高的产物收率。此外,使用外部磁体可以很容易地将引入的催化剂回收至多达4个连续运行,并且具有一致的活性。
Fe
<sub>3</sub>
O
<sub>4</sub>
@MCM‐41@ZrCl
<sub>2</sub>
: A novel magnetic mesoporous nanocomposite catalyst including zirconium nanoparticles for the synthesis of 1‐(benzothiazolylamino)phenylmethyl‐2‐naphthols
reports the synthesis of a new magnetic mesoporous nanocomposite with core–shell structure, formulated as Fe3O4@MCM‐41@ZrCl2. The prepared reagent was successfully characterized using different types of methods. The combination of unique properties of MCM‐41 as an inimitable mesoporous compound, satisfying magnetic nature of the Fe3O4 magnetic nanoparticles and substantial catalyticalapplications of zirconium
本文报道了一种新的具有核-壳结构的磁性介孔纳米复合材料的合成,其配方为Fe 3 O 4 @ MCM-41 @ ZrCl 2。使用不同类型的方法成功地表征了所制备的试剂。MCM-41作为独特的介孔化合物的独特性能的组合,满足了Fe 3 O 4的磁性磁性纳米颗粒和锆的大量催化应用,通过在不存在的情况下通过2-氨基苯并噻唑,2-萘酚和芳香醛的多组分缩合反应,在合成1-(苯并噻唑基氨基)苯基甲基-2-萘酚中,预期的纳米复合材料具有良好的催化效率。溶剂以高到高的收率(70-90%)。该反应的绿色条件,易于分离,实用性,产物纯度,催化剂的可重复使用性,可负担性和环境效益是该方案的显着优点。