Multicomponent Solvent-Free Synthesis Of Benzimidazolyl Imidazo[1,2-a]-pyridine Under Microwave Irradiation
摘要:
A novel one-pot, three-component reaction employing variously substituted benzimidazole-linked amino pyridines, aldehydes, and isonitriles catalyzed by scandium(III) triflate under solvent-free conditions were accomplished. This new synthetic methodology facilitates the rapid generation of intricate molecular frameworks in three-dimensional fashion leading to benzinaidazole-imidazo [1,2-a] pyridines. This approach is envisioned as an environmentally benign process and a simple operation to the biological interesting compounds. The present synthetic sequence permits the introduction of three points of structural diversity to expand chemical space with high purity and excellent yields.
Copper catalyzed aerobic oxidative cyclization and ketonization: one pot synthesis of benzoimidazo[1,2-a]imidazolones
作者:Manikandan Selvaraju、Tzuen-Yang Ye、Chia-Hsin Li、Pei-Heng Ho、Chung-Ming Sun
DOI:10.1039/c6cc01828a
日期:——
A highly efficientsynthesis of benzoimidazo[1,2-a]imidazolone through a novel oxidative 5-exo-dig cyclization-ketonization cascade of 2-aminobenzimidazole, aldehyde and terminalalkyne has been explored underaerobicconditions.
在有氧条件下,通过2-氨基苯并咪唑,醛和末端炔的新型5 - exo -dig环化-酮化级联反应,高效合成了苯并咪唑并[1,2- a ]咪唑酮。
[EN] NOVEL SUBSTITUTED BENZIMIDAZOLE DERIVATIVES AS D-AMINO ACID OXIDASE (DAAO) INHIBITORS<br/>[FR] NOUVEAUX DÉRIVÉS DE BENZIMIDAZOLE SUBSTITUÉS UTILISÉS EN TANT QU'INHIBITEURS DE LA D-AMINO-ACIDE OXYDASE (DAAO)
申请人:TSENG YUFENG JANE
公开号:WO2018053161A1
公开(公告)日:2018-03-22
The present invention provides novel substituted benzimidazole derivatives used as DAAO inhibitors and for treatment and/or prevention of neurological disorders.
Diversity-Oriented Synthesis of Coumarin-Linked Benzimidazoles via a One-Pot, Three-Step, Intramolecular Knoevenagel Cyclization
作者:Po-Hsin Eric Yao、Sunil Kumar、Yu-Li Liu、Chiu-Ping Fang、Chia-Chen Liu、Chung-Ming Sun
DOI:10.1021/acscombsci.7b00004
日期:2017.4.10
Diversity-oriented synthesis of coumarin-linked benzimidazoles from N-(2-aminophenyl)-2-cyanoacetamide was achieved via a one-pot, three-step sequential reaction in excellent yields. In situ intramolecular cyclization of the cyanoacetamide afforded benzimidazoles which subsequently underwent a Knoevenagel condensation of the 2-cyanomethylbenzimidazoles with salicylaldehydes promoted by triethylamine
Design and Synthesis of New Biprivileged Molecular Scaffolds: Indolo‐Fused Benzodiazepinyl/quinoxalinyl benzimidazoles
作者:Indrajeet J. Barve、Chan‐Yu Chen、Deepak B. Salunke、Wen‐Sheng Chung、Chung‐Ming Sun
DOI:10.1002/asia.201200121
日期:2012.7
describes the design and synthesis of newbiprivilegedmolecularscaffolds with diverse structural features. Commercially available, simple heterocyclic building blocks such as 4‐fluoro‐3‐nitrobenzoic acid, 2‐chloro‐3‐nitrobenzoic acid, and indoline were utilized for the synthesis of the novel heterocycles. Pictet–Spengler‐type condensation was used as a key step to construct tetracyclic indolo‐benzodiazepines
Three Component Divergent Reactions: Base-Controlled Amphiphilic Synthesis of Benzimidazole-Linked Thiazetidines and Fused Thiadiazines
作者:Manikandan Selvaraju、Sandip Dhole、Chung-Ming Sun
DOI:10.1021/acs.joc.6b01586
日期:2016.10.7
A divergent reaction of 2-aminobenzimidazole with isothiocyanates and dihalomethanes has been developed for the selective synthesis of benzoimidazothiazetidine and benzoimidazothiadiazine. A single-pot reaction of 2-aminobenzimidazole in the presence of sodium hydride delivers benzoimidazothiazetidine, whereas triethylamine promotes the formation of benzoimidazothiadiazine via a sequential stepwise, fashion. The reaction sequence involves the initial formation of thiourea followed by regioselective nucleophilic addition and intramolecular ring-closing with dihalo electrophiles. The observed regioselectivity,of this reaction is governed by the nature of bases and the reaction sequence.