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。
Cellulose@Fe2O3 nanoparticle composites: magnetically recyclable nanocatalyst for the synthesis of 3-aminoimidazo[1,2-a]pyridines
3-Aminoimidazo[1,2-a]pyridines have been synthesized through a condensation reaction of 2-aminopyridine, an aldehyde and an alkyl or aryl isocyanide in high yields in the presence of a catalytic amount of cellulose@Fe2O3 as a magnetically recoverable heterogeneous catalyst. High catalytic activity, good reusability, and simple magnetic work-up are some of the salient features of the present protocol. .
One-Pot Three-Component Synthesis of 3-Aminoimidazo[1,2-a]pyridines and -pyrazines in the Presence of Silica Sulfuric Acid
作者:Ahmad Shaabani、Ebrahim Soleimani、Ali Maleki
DOI:10.1007/s00706-006-0561-6
日期:2007.1
The synthesis of 3-aminoimidazo[1,2-a]pyridines and 3-aminoimidazo[1,2-a]pyrazines through a condensation reaction of 2-aminopyridine or 2-aminopyrazine, aldehyde, and alkyl or aryl isocyanide in high yields at room temperature in the presence of silica sulfuric acid is described.
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