Synthesis and characterization of fluconazole-functionalized magnetic nanoparticles as a catalyst for the synthesis of 3-aryl and 3-amino-imidazo[1,2-a]pyridines
Fluconazole immobilised on modified Fe3O4–SiO2 core–shell nanoparticles was synthesised, characterised and used as a catalyst in synthesis of 3-aryl and 3-amino-imidazo[1,2-a]pyridines.
Imidazoazines have been synthesized by a one-potthree-component condensation reaction of an aldehyde, a 2-aminoazine and an isocyanide in the presence of the cellulose sulfuric acid, as an effective bio-supported catalyst in excellent yields. The reaction work-up is simple and the catalyst can be easily separated from the product and reused in several times.
A facile, efficient and environment-friendly protocol for the synthesis of 3-aminoimidazo[1,2-a]pyridines has been developed by one-pot condensation of 2-aminopyridine, aromatic aldehyde and alkyl or aryl isocyanide in the presence of P2O5 as catalyst under solvent-free conditions at room temperature. The present approach offers the advantages of clean reaction, simple methodology, short reaction time, high yield, easy purification, and economic availability of the catalyst.
Ionic liquid promoted one-pot synthesis of 3-aminoimidazo[1,2-a]pyridines
作者:Ahmad Shaabani、Ebrahim Soleimani、Ali Maleki
DOI:10.1016/j.tetlet.2006.03.011
日期:2006.5
3-Aminoimidazo[1,2-a]pyridines have been synthesized in good to excellent yields in the presence of the ionicliquid 1-butyl-3-methylimidazolium bromide [bmim]Br, the reaction workup is simple and the ionicliquid can be easily separated from the product and reused.
在离子液体溴化1-丁基-3-甲基咪唑鎓溴化[bmim] Br的存在下,合成了3-氨基咪唑并[1,2- a ]吡啶,收率好至极好,反应后处理简单,离子液体可以易于与产品分离并重复使用。
One-pot oxidative Groebke–Blackburn–Bienayme reaction of alcohols: using bio-supported and magnetically recyclable Fe2O3@cellulose and Fe2O3@cellulose–SO3H nanocomposites for the synthesis of 3-aminoimidazo[1,2-a]pyridines
reaction has been successfully developed with primary alcohols instead of their corresponding aldehydes in the presence of recyclable Fe2O3@cellulose and Fe2O3@cellulose–SO3H catalysts. In this work, an efficient protocol for the oxidative synthesis of 3-aminoimidazo[1,2-a]pyridines via an alcohol, 2-aminopyridine, and an isocyanide in excellent yields in the presence of a catalytic amount of Fe2O3@cellulose
摘要在可循环使用的Fe 2 O 3纤维素和Fe 2 O 3纤维素-SO 3 H催化剂的存在下,已经成功地开发出了伯醇一锅式氧化Groebke–Blackburn–Bienayme三组分反应,而不是其相应的醛。在这项工作中,3-氨基咪唑的氧化合成的有效协议[1,2一]吡啶通过醇,2-氨基吡啶,并以优良产率以Fe催化量的存在下,胩2 ö 3 @纤维素或Fe 2 O 3 @纤维素–SO 3描述了H作为可磁回收的非均相催化剂。反应后处理很简单,催化剂可以很容易地从反应介质中磁性分离出来,并在随后的反应中重新使用。 图形概要