摘要磁性可分离的介孔聚三聚氰胺-甲醛纳米复合材料(Fe 3 O 4 @mPMF)已通过FTIR光谱,SEM,XRD光谱和EDS进行了表征。磁性可分离的Fe 3 O 4 @mPMF催化剂具有优异的效率,可通过2-氨基吡啶,醛和异氰酸酯的三组分反应以优异的优良性能合成各种咪唑并[1,2-a]吡啶。通过环境友好和简单的程序,可在较短的反应时间内获得产量。当反应完成数次而催化活性没有明显降低时,可以回收并再利用的纳米复合材料易于回收并且也可以重复使用。 图形摘要
A microwave-promoted highly flexible and efficientUgi-type multicomponent reaction of heterocyclic amidines with aldehydes and isocyanides catalyzed by zirconium(IV) chloride was developed. The general protocol offered the very reliable synthesis of a library of medicinally important, widely versatile N-fused aminoimidazoles in excellent yields. Poorly reactive heterocyclic amidines, functionally
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.
Multicomponent synthesis of imidazo[1,2-a]pyridines using catalytic zinc chloride
作者:Amanda L. Rousseau、Pulane Matlaba、Christopher J. Parkinson
DOI:10.1016/j.tetlet.2007.04.008
日期:2007.6
The novel use of zincchloride to catalyze the one-pot, three component synthesis of imidazo[1,2-a]pyridines from a range of substrates using either conventional heating or microwave irradiation is described. This methodology affords a number of imidazo[1,2-a]pyridines in reasonable yields and short reaction times without any significant optimization of the reaction conditions.
描述了使用常规加热或微波辐照从一系列底物上催化氯化锌催化一锅,三组分合成咪唑并[1,2- a ]吡啶的新方法。该方法以合理的产率和短的反应时间提供了许多咪唑并[1,2- a ]吡啶,而没有对反应条件进行任何显着的优化。
Magnetic mesoporous poly-melamine–formaldehyde: an efficient and recyclable catalyst for straightforward one-pot synthesis of imidazo[1,2-a]pyridines
synthesized and characterized by FTIR spectroscopy, SEM, XRD spectroscopy and EDS. The magnetically separable Fe3O4@mPMF catalyst had excellent efficiency for the synthesis a wide diversity of imidazo[1,2-a]pyridines by a three-component reaction of a 2-aminopyridine, aldehyde and isocyanide in good-to-excellent yields within a short reaction time, through an environmental friendliness and straightforward
摘要磁性可分离的介孔聚三聚氰胺-甲醛纳米复合材料(Fe 3 O 4 @mPMF)已通过FTIR光谱,SEM,XRD光谱和EDS进行了表征。磁性可分离的Fe 3 O 4 @mPMF催化剂具有优异的效率,可通过2-氨基吡啶,醛和异氰酸酯的三组分反应以优异的优良性能合成各种咪唑并[1,2-a]吡啶。通过环境友好和简单的程序,可在较短的反应时间内获得产量。当反应完成数次而催化活性没有明显降低时,可以回收并再利用的纳米复合材料易于回收并且也可以重复使用。 图形摘要