<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetrabromobenzene-1,3-disulfonamide and Poly(<i>N</i>-bromo-<i>N</i>-ethylbenzene-1,3-disulfonamide) as Mild and Efficient Catalysts for Solvent-free Synthesis of<i>N</i>-Cyclohexyl-2-aryl(alkyl)-imidazo[1,2-<i>a</i>]pyridin-3-amine Derivatives
作者:Ramin Ghorbani-Vaghei、Mostafa Amiri
DOI:10.1002/jhet.1875
日期:2014.8
have been synthesized in good to high yields from o-aminopyridine, aromatic and aliphatic aldehydes, and cyclohexyl isocyanide in the presence of N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide and poly(N-bromo-N-ethylbenzene-1,3-disulfonamide) as catalysts, at room temperature under solvent-free conditions.
N-环己基-2-芳基(烷基)-咪唑并[1,2 - a ]吡啶-3-胺衍生物已从邻氨基吡啶,芳香族和脂肪族醛以及在室温,无溶剂下,在N,N,N ',N'-四溴苯-1,3-二磺酰胺和聚(N-溴-N-乙基苯-1,3-二磺酰胺)的存在下环己基异氰化物情况。
Green synthesis of imidazo[1,2-a]pyridines using calix[6]arene-SO3H surfactant in water
In this research, greensynthesis of imidazo[1,2-a]pyridines in the presence of calix[n]arenes-SO3H as a Brønsted acid catalyst and surfactant is described. Using of calix[n]arenes in water provided a hydrophobic cavity that successfully carried out the synthesis reactions at short times with high yields. This catalyst system is recoverable with a simple extraction using an organic solvent and reusable
在这项研究中,描述了在杯[ n ]芳烃-SO 3 H作为布朗斯台德酸催化剂和表面活性剂的存在下绿色合成咪唑并[1,2- a ]吡啶。在水中使用杯芳烃[ n ]芳烃提供了疏水腔,该腔在短时间内成功地以高收率成功地进行了合成反应。该催化剂体系可通过使用有机溶剂的简单萃取而回收,并且可重复使用至少5个循环而不会损失其活性。
Eco-friendly synthesis of 3-aminoimidazo [1, 2-a] pyridines via a one-pot three-component reaction in PEG catalyzed by peptide nanofibers: as hydrogen-bonding organocatalyst
作者:Arash Ghorbani-Choghamarani、Zahra Taherinia
DOI:10.1007/s13738-019-01744-w
日期:2020.1
additives. The key advantages of catalytic systems are (1) using peptide nanofibers as powerful hydrogen-bonding organocatalysts for the synthesis of 3-aminoimidazo [1, 2-a] pyridines, (2) having high catalytic activity, and (3) performing the reactions which can be carried out in PEG, as greensolvent instead of the usually used organic solvents. This catalyst could be recycled and reused at least for
Visible-light-activated C–C and C–N bond formation in the synthesis of imidazo[1,2-<i>a</i>]pyridines and imidazo[2,1-<i>b</i>]thiazoles under catalyst and solvent-free conditions
作者:Km Neha Shivhare、Manish K. Jaiswal、Anushree Srivastava、Saurabh K. Tiwari、I. R. Siddiqui
DOI:10.1039/c8nj03339k
日期:——
Synthesis of 3-aminoimidazo-fused heterocycles via the Groebke–Blackburn–Bienaymé reaction using a universally available energy source under catalyst and solvent-free conditions.
A facile protocol for the synthesis of 3-aminoimidazo-fused heterocycles via the Groebke–Blackburn–Bienayme reaction under catalyst-free and solvent-free conditions
作者:Shinde Vidyacharan、Anand H. Shinde、Bishnupada Satpathi、Duddu S. Sharada
DOI:10.1039/c3gc42130a
日期:——
A one-pot catalyst, solvent, work-up and column free synthesis of 3-aminoimidazo-fused heterocycles by a three-component reaction of a 2-aminoheterocycle, aldehyde, and isocyanide is presented. This efficient and green protocol has the advantages of environmental friendliness, high yields and operational simplicity.