A simple and efficient procedure for the synthesis of benzo[4,5]imidazo[1,2-α]pyrimidine and 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazolo[1,2-α]pyrimidine-3-carbonitrile derivatives using poly(vinylpyrrolidonium) perchlorate [PVPH]ClO4} as a newly reported, modified polymeric catalyst is reported. Some of the advantages of this novel synthetic method are: easy preparation of the catalyst,
A series of pyrimido[1,2‐a]benzimidazoles were obtained from aldehydes, 2‐aminobenzimidazole and ethyl acetoacetate in good‐to‐excellent yields by a simple, mild, and efficient procedure utilizing N,N,N′,N′‐tetrabromobenzene‐1,3‐disulfonamide (TBBDA) and poly(N‐bromo‐N‐ethylbenzene‐1,3‐disulfonamide) (PBBS) as catalysts.
通过使用N,N,N',N'-的简单,温和且有效的方法,从醛,2-氨基苯并咪唑和乙酰乙酸乙酯中获得了一系列嘧啶[1,2- a ]苯并咪唑,收率良好至优异。四溴苯-1,3-二磺酰胺(TBBDA)和聚(N-溴-N-乙基苯-1,3-二磺酰胺)(PBBS)作为催化剂。
Preparation and characterization of copper/polysulfonamide complex immobilized on geraphene oxide as a novel catalyst for the synthesis of pyrimido[1,2‐a]benzimidazoles
Copper–polysulfonamide complex immobilized on geraphene oxide as a novel heterogeneous catalyst (GO@PSA‐Cu) was synthesized and the structure and morphology of catalyst were characterized with various analytical techniques such as Fourier‐transform infrared spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray, N2 isotherms, elemental mapping, inductively coupled plasma–MS, and thermogravimetric
Microwave‐assisted synthesis of benzo[4,5]imidazo[1,2‐<i>a</i>]pyrimidines and pyrano[4,3‐<i>b</i>]pyrans catalyzed by L‐glutamine functionalized magnetic nanoparticles in water:ethanol mixture
作者:Aiborlang Thongni、Rishanlang Nongkhlaw、Chayan Pandya、Akella Sivaramakrishna、Paige M. Gannon、Werner Kaminsky
DOI:10.1002/jhet.4785
日期:2024.4
one-pot syntheses of benzo[4,5]imidazo[1,2-a]pyrimidine and pyrano[4,3-b]pyran derivatives using L-glutamine functionalized nanoparticles (Fe3O4@SiO2@L-glutamine NPs) undermicrowave irradiation. The organo-nanocatalyst underwent characterization through diverse techniques, including FT-IR, p-XRD, SEM, TEM, EDX, XPS, TGA, and VSM. Microwave irradiation and multicomponent reactions synergistically yield