Sulfonated chitosan-encapsulated HAp@Fe3O4: an efficient and recyclable magnetic nanocatalyst for rapid eco-friendly synthesis of 2-amino-4-substituted-1,4-dihydrobenzo[4, 5]imidazo[1,2-a]pyrimidine-3-carbonitriles
作者:Vilas N. Mahire、Girish P. Patil、Amol B. Deore、Padmakar G. Chavan、Harishchandra D. Jirimali、Pramod P. Mahulikar
DOI:10.1007/s11164-018-3456-3
日期:2018.10
A one-pot, multi-component, synthetic method for preparation of 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitriles has been developed. It was accomplished by mixing 2-aminobenzimidazole, aldehyde and malononitrile in the presence of S-Chit-HAp@Fe3O4 as a nanocatalyst in aqueous medium. The catalyst (S-Chit-HAp@Fe3O4) was synthesized using a co-precipitation method and further characterized by using FT-IR, XRD, FE-SEM, EDX, HR-TEM, TGA and VSM analysis. It was found that the catalyst exhibits magnetic properties and showed high catalytical activity for the synthesis of 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitriles. S-Chit-HAp@Fe3O4 nanoparticles catalyzing one-pot, multi-component synthesis of 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitriles in aqueous medium has been reported herein.
本研究开发了一种制备 2-氨基-4-取代-1,4-二氢苯并[4,5]咪唑并[1,2-a]嘧啶-3-甲腈的单锅多组分合成方法。在水介质中,将 2-氨基苯并咪唑、醛和丙二腈混合,并以 S-Chit-HAp@Fe3O4 作为纳米催化剂。催化剂(S-Chit-HAp@Fe3O4)采用共沉淀法合成,并通过傅立叶变换红外光谱(FT-IR)、XRD、FE-SEM、EDX、HR-TEM、TGA 和 VSM 分析进行了进一步表征。研究发现,该催化剂具有磁性,在合成 2-氨基-4-取代的-1,4-二氢苯并[4,5]咪唑并[1,2-a]嘧啶-3-甲腈方面表现出很高的催化活性。本文报道了 S-Chit-HAp@Fe3O4 纳米粒子在水介质中催化 2-氨基-4-取代的-1,4-二氢苯并[4,5]咪唑并[1,2-a]嘧啶-3-甲腈的一锅多组分合成。