Ruthenium-catalyzed benzimidazoisoquinoline synthesis via oxidative coupling of 2-arylbenzimidazoles with alkynes
摘要:
Synthesis of a fused bis-heterocyclic framework, benzimidazoisoquinoline, has been achieved using Ru-catalyzed reaction of alkynes with 2-aryl benzimidazoles in the presence of Cu salts. The method provides an easy access for the generation of a library of benzimidazoisoquinoline derivatives. (C) 2013 Elsevier Ltd. All rights reserved.
Solvent-dependent metal-free chemoselective synthesis of benzimidazoles and 1,3,5-triarylbenzenes from 2-amino anilines and aryl alkyl ketones catalyzed by I2
作者:Yuxin Ding、Renchao Ma、Yongmin Ma
DOI:10.1016/j.tetlet.2021.153016
日期:2021.4
the synthesis of benzimidazoles and 1,3,5-triarylbenzenes via the annulation of 2-amino anilines and arylalkylketones or the cyclization of arylalkylketones, respectively. With 1,4-dioxane as the solvent, sequential CN bond formation followed by C(CO)-C(CH3) bond cleavage leads to the formation of benzimidazoles in a highly selective manner while aldol-type self-condensation of arylalkyl ketones
Synthesis of Benzimidazoles and Benzoxazoles Using Palladium Bis(2,2,6,6-tetramethyl-3,5-heptanedionate) as a Novel Catalyst
作者:Malhari D. Bhor、Bhalchandra M. Bhanage
DOI:10.1080/00397910903161728
日期:2010.5.19
Structurally well-defined palladium bis(2,2,6,6-tetramethyl-3,5-heptanedionate) complex is reported to be an efficient catalyst for the synthesis of benzimidazole and benzoxazole derivatives in good yields. A novel approach for one-pot synthesis of benzimidazoles via direct reductive amination and N-arylation followed by hydrogenation–cyclization methodology is also described.
Synthesis of 2-Substituted Benzimidazoles in the Presence of Polyaniline Nanoparticles Doped With 12-Tungstophosphoric Acid as Reusable Heterogeneous Catalyst
Polyaniline nanoparticles doped with 12-tungstophosphoricacid was prepared with different loading amounts of 12-tungstophosphoricacid. Doped polyaniline was characterized by XRD, SEM, and FT-IR techniques and the Keggin anion of heteropoly acid was detected on the polymer. Doped polymer was used as heterogeneous solid acidcatalyst for the synthesis of 2-substituted benzimidazoles by the reaction
作者:Ramar Arumugam、Bhaskaran Shankar、K. R. Soumya、Malaichamy Sathiyendiran
DOI:10.1039/c8dt05065a
日期:——
coordination complexes via a one-pot approach. The new ligands and the complexes were characterized using various analytical and spectroscopic methods. The molecularstructures of the complexes were determined using single crystal X-raydiffraction analysis, which reveal that four rhenium cores are arranged in the vertices, and four ligands are at the edges of the tetrahedron.