NH3(CH2)5NH3BiCl5 as a new hybrid and efficient catalyst for the synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives under solvent-free conditions
Abstract A simple, efficient and green procedure for synthesis 1-(benzothiazolylamino)methyl-2-naphthol derivatives via one-pot three-component condensation of aromatic aldehydes, β-naphthol and 2-aminobenzothiazole has been studied by using a novel hybrid catalyst NH3(CH2)5NH3BiCl5 undersolvent-freeconditions at 100 °C. This method has several advantages such as operational simplicity, recyclability
摘要 利用新型杂化催化剂 NH3,研究了芳香醛、β-萘酚和 2-氨基苯并噻唑的一锅三组分缩合合成 1-(苯并噻唑基氨基)甲基-2-萘酚衍生物的简便、高效、绿色的方法。 (CH2)5NH3BiCl5 在 100 °C 无溶剂条件下。该方法具有操作简单、催化剂可回收、后处理容易、反应时间短、收率高等优点。
Role of surfactant and micelle-promoted mild, efficient, sustainable synthesis of 2-aminobenzothiazolomethyl naphthols and 5-(2-aminobenzothiazolomethyl)-6-hydroxyquinolines in water at room temperature
作者:Pramod K. Sahu、Praveen K. Sahu、Dau D. Agarwal
DOI:10.1039/c4ra03847a
日期:——
A new green protocol for the efficient surfactant catalyzed synthesis of 2-aminobenzothiazolomethyl naphthols and 5-(2-aminobenzothiazolomethyl)-6-hydroxyquinolines from substituted aromatic aldehydes, 2-aminobenzothiazole and 2-naphthol or 6-hydroxyquinoline at room temperature in water was developed for the first time. The influence of the sodium lauryl sulphate (SLS) micelles and their different concentrations on reactivity of 2-aminobenzothiazolomethyl naphthol was studied. It was found that best yield was obtained with 10 mol% catalyst loading with minimum time as compared to when other surfactants and catalysts were used. The best yield of product was achieved by using 10 mol% of SLS. This procedure resulted in a general and environmentally benign protocol and has the advantages of better reusability of the catalyst system, excellent yield, short reaction time and ease of work up.
NaHSO<sub>4</sub>.H<sub>2</sub>O Catalyzed Multicomponent Synthesis of 1-(Benzothiazolylamino) Methyl-2-Naphthols Under Solvent-Free Conditions
作者:Asghar Hosseinian、Hamid Reza Shaterian
DOI:10.1080/10426507.2012.664221
日期:2012.9.1
A one-pot, efficient three-component condensation of aldehydes, 2-naphthol, and 2-aminobenzothiazole in the presence of sodium hydrogen sulfate as an effective catalyst for the synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives under thermal and solvent-free conditions is described. These products involve two biologically active parts, Betti's base and benzothiazole. The present methodology offers several advantages, such as good yields, short reaction times, and easy work-up.