QUINOLONES USEFUL AS INDUCIBLE NITRIC OXIDE SYNTHASE INHIBITORS
申请人:Smith Nicholas D.
公开号:US20080139558A1
公开(公告)日:2008-06-12
The present invention relates to novel quinolones of Formula I that inhibit inducible NOS synthase together with methods of synthesizing and using the compounds including methods for inhibiting or modulating nitric oxide synthesis and/or lowering nitric oxide levels in a patient by administering the compounds for the treatment of disease.
An efficient route for the synthesis of benzimidazoles via a hydrogen-transfer strategy between o -nitroanilines and alcohols
作者:Xiaotong Li、Renhe Hu、Yao Tong、Qiang Pan、Dazhuang Miao、Shiqing Han
DOI:10.1016/j.tetlet.2016.09.018
日期:2016.10
[1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) has been used as an efficient catalyst for the synthesis of 2-substituted benzimidazoles via a hydrogen-transfer strategy. Various 2-substituted benzimidazoles were synthesized in good to excellent yields (up to 97%). The reaction shows good functional group tolerance. And no additional additive, oxidant, or reductant was required for the
Sodium Sulfide: A Sustainable Solution for Unbalanced Redox Condensation Reaction between o-Nitroanilines and Alcohols Catalyzed by an Iron–Sulfur System
作者:Thanh Nguyen、Ali Al-Mourabit、Ludmila Ermolenko
DOI:10.1055/s-0034-1380134
日期:——
redox condensation reaction between o-nitroanilines and alcohols, leading to benzimidazole and quinoxaline heterocycles can be efficiently promoted and catalyzed by sodium sulfide (40 mol%) in combination with iron(III) chloride hexahydrate (1 mol%). Beside the role as a precursor for the iron–sulfur (Fe/S) catalyst formation, hydrated sodium sulfide was shown to be an excellent noncompetitive, multi-electron
Cobalt-Catalyzed Sustainable Synthesis of Benzimidazoles by Redox-Economical Coupling of <i>o</i>-Nitroanilines and Alcohols
作者:Sanju Das、Samrat Mallick、Suman De Sarkar
DOI:10.1021/acs.joc.9b02090
日期:2019.9.20
This study reveals cobalt-catalyzed sustainable synthesis of benzimidazoles by redox-economical coupling of o-nitroanilines and alcohols. The major advantage of this report is the use of a commercially available cheap cobalt catalyst to produce a wide variety of 2-substituted benzimidazoles by hydrogen autotransfer without using any additional external redox reagent and costly ligand system. A thorough
A gold-catalyzedoxidation of arylallenes to form alpha-diketones and aldehydes in good yields is presented. Further directed synthesis of quinoxalines and benzimidazoles, via the condensation of the resulting alpha-diketones and aldehydes with benzene-1,2-diamine, was achieved in high yields.