I2/TBHP promoted oxidative C–N bond formation at room temperature: Divergent access of 2-substituted benzimidazoles involving ring distortion
作者:Moumita Saha、Asish R. Das
DOI:10.1016/j.tetlet.2018.05.028
日期:2018.6
A new ‘one pot’ tandemsynthesis of 2-substituted benzimidazoles has been developed from 2-aminobenzyl alcohol/2-aminobenzamide and different coupling partners (nitriles, aldehydes and 1,3-diketones) via iodine and TBHP promoted oxidative ringcontraction. The present strategy involves sequential C–N bond formation, cyclization, subsequent ringcontraction and dehydrogenation to afford various medicinally
Copper-catalyzed radical cascade cyclization for synthesis of CF<sub>3</sub>-containing tetracyclic benzimidazo[2,1-<i>a</i>]iso-quinolin-6(5<i>H</i>)-ones
copper-catalyzed radical cascade carbocyclization reaction with 2-arylbenzoimidazoles and a Togni reagent was realized. Structurally diverse CF3-containing tetracyclic core benzimidazo[2,1-a]isoquinoline-6(5H)-ones were obtained in moderate to good yields. The wide substrate scope, good functional group tolerance, and ease of scale-up of this method are expected to promote its potential applications in pharmacy
在此,实现了与2-芳基苯并咪唑和Togni试剂的一般的铜催化的自由基级联碳环化反应。以中等至良好的产率获得了结构多样的含CF 3的四环核苯并咪唑并[2,1 - a ]异喹啉-6(5 H)-。预期该方法的广泛底物范围,良好的官能团耐受性和易于放大的规模将促进其在药学和生物技术中的潜在应用。
One-pot synthesis of 2-substituted benzimidazoles catalyzed by anhydrous FePO4
作者:Farahnaz K. Behbahani、Parisa Ziaei
DOI:10.1007/s10593-012-1093-0
日期:2012.10
Anhydrous FePO4 has been employed as a catalyst for efficient synthesis of 2-substituted benzimidazoles. Simple and convenient procedure, easy purification and shorter reaction time are the advantages of this method, resulting in several known and three new compounds.
Novel N-ferrocenylmethyl, N′-methyl-2-substituted benzimidazolium iodide salts with in vitro activity against the P. falciparum malarial parasite strain NF54
作者:Joshua Howarth、Keith Hanlon
DOI:10.1016/s0040-4039(00)02106-7
日期:2001.1
Herein we disclose results of our research into a novel class of benzimidazolium compounds active against malarial parasites. We have discovered that N-ferrocenylmethyl, N'-methyl-2-aryl (or styryl) benzimidazolium iodide salts show excellent in vitro activity against the P. falciparum malarial parasite strain NF54. (C) 2001 Elsevier Science Ltd. All rights reserved.