1,2-Disubstituted Benzimidazoles by the Iron Catalyzed Cross-Dehydrogenative Coupling of Isomeric <i>o</i>-Phenylenediamine Substrates
作者:Pawan Thapa、Philip M. Palacios、Tam Tran、Brad S. Pierce、Frank W. Foss
DOI:10.1021/acs.joc.9b02714
日期:2020.2.21
Benzimidazoles are common in nature, medicines, and materials. Numerous strategies for preparing 2-arylbenzimidazoles exist. In this work, 1,2-disubstituted benzimidazoles were prepared from various mono- and disubstituted ortho-phenylenediamines (OPD) by iron-catalyzed oxidative coupling. Specifically, O2 and FeCl3·6H2O catalyzed the cross-dehydrogenative coupling and aromatization of diarylmethyl
Synthesis of benzimidazoles via iridium-catalyzed acceptorless dehydrogenative coupling
作者:Xiang Sun、Xiao-Hui Lv、Lin-Miao Ye、Yu Hu、Yan-Yan Chen、Xue-Jing Zhang、Ming Yan
DOI:10.1039/c5ob00904a
日期:——
Benzimidazoles were prepared in good yieldsviathe iridium-catalyzed acceptorless dehydrogenative coupling of tertiary amines and arylamines.
苯并咪唑类化合物通过铱催化的受体无氧脱氢偶联反应,产率较高。
Optimisation of 2-(N-phenyl carboxamide) triazolopyrimidine antimalarials with moderate to slow acting erythrocytic stage activity
作者:Brodie L. Bailey、William Nguyen、Anna Ngo、Christopher D. Goodman、Maria R. Gancheva、Paola Favuzza、Laura M. Sanz、Francisco-Javier Gamo、Kym N. Lowes、Geoffrey I. McFadden、Danny W. Wilson、Benoît Laleu、Stephen Brand、Paul F. Jackson、Alan F. Cowman、Brad E. Sleebs
DOI:10.1016/j.bioorg.2021.105244
日期:2021.10
the Janssen Jumpstarter library against the asexual stages of the P. falciparum parasite. Here we describe the structure activity relationship of the identified class and the optimisation of asexual stage activity while maintaining selectivity against the human HepG2 cell line. The most potent analogues from this study were shown to exhibit equipotent activityagainst P. falciparum multidrug resistant
<i>tert</i>-Amino Effect-Promoted Rearrangement of Aryl Isothiocyanate: A Versatile Approach to Benzimidazothiazepines and Benzimidazothioethers
作者:Xinyu Geng、Siyuan Liu、Wenyao Wang、Jingping Qu、Baomin Wang
DOI:10.1021/acs.joc.0c01806
日期:2020.10.2
A general and practical approach to benzimidazothiazepine and benzimidazothioether derivatives via an intramolecular nucleophilic addition/ring expansion rearrangement of aryl isothiocyanates promoted by the tert-amino effect has been developed. This reaction is catalyzed by low-cost camphorsulfonic acid and tolerates a broad substrate scope with complete atom economy. Structurally intriguing benzimidazothiazepine