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
An Efficient, Regioselective, Versatile Synthesis of N-Fused 2- and 3-Aminoimidazoles via Ugi-Type Multicomponent Reaction Mediated by Zirconium(IV) Chloride in Polyethylene Glycol-400
作者:Sankar Guchhait、Chetna Madaan
DOI:10.1055/s-0028-1087915
日期:2009.3
An Ugi-type multicomponent reaction of heterocyclicamidines with aldehydes and isocyanides catalyzed by zirconium(IV) chloride in PEG-400 was developed. The protocol offers the rapid, environment friendly, regioselective and versatile synthesis of medicinally important N-fused 2- and 3-aminoimidazoles in good to high yields. The combination of catalyst and solvent, that was judiciously explored, was
开发了 PEG-400 中氯化锆 (IV) 催化的杂环脒与醛和异氰化物的 Ugi 型多组分反应。该协议提供了快速、环境友好、区域选择性和多功能的医学上重要的 N-融合 2-和 3-氨基咪唑的合成,产量高。明智地探索了催化剂和溶剂的组合,对于该方法的区域选择性和多功能性至关重要。
N-Fused Imidazoles As Novel Anticancer Agents That Inhibit Catalytic Activity of Topoisomerase IIα and Induce Apoptosis in G1/S Phase
作者:Ashish T. Baviskar、Chetna Madaan、Ranjan Preet、Purusottam Mohapatra、Vaibhav Jain、Amit Agarwal、Sankar K. Guchhait、Chanakya N. Kundu、Uttam C. Banerjee、Prasad V. Bharatam
DOI:10.1021/jm200235u
日期:2011.7.28
substituents exhibited potent inhibition of catalytic activity of hTopoIIα while not showing DNA intercalation. Molecular docking studies and molecular dynamics (MD) simulation analysis, ATPase-kinetics and ATP-dependent plasmid relaxation assay revealed the catalytic mode of inhibition of the title compounds plausibly by blocking the ATP-binding site. N-Fused aminoimidazoles showed potent anticancer activities