systematic evaluation of structure-activity relationships of the riminophenazine class and discovery of a c2 pyridylamino series for the treatment of multidrug-resistant tuberculosis
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2012
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Abstract
Clofazimine, a member of the riminophenazine class of drugs, is the cornerstone agent for the treatment of leprosy. This agent is currently being studied in clinical trials for the treatment of multidrug-resistant tuberculosis to address the urgent need for new drugs that can overcome existing and emerging drug resistance. However, the use of clofazimine in tuberculosis treatment is hampered by its high lipophilicity and skin pigmentation side effects. To identify a new generation of riminophenazines that is less lipophilic and skin staining, while maintaining efficacy, we have performed a systematic structure-activity relationship (SAR) investigation by synthesizing a variety of analogs of clofazimine and evaluating their anti-tuberculosis activity. The study reveals that the central tricyclic phenazine system and the pendant aromatic rings are important for anti-tuberculosis activity. However, the phenyl groups attached to the C2 and N5 position of clofazimine can be replaced by a pyridyl group to provide analogs with improved physicochemical properties and pharmacokinetic characteristics. Replacement of the phenyl group attached to the C2 position by a pyridyl group has led to a promising new series of compounds with improved physicochemical properties, improved anti-tuberculosis potency, and reduced pigmentation potential.
| Reference Key |
huang2012moleculessystematic
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| Authors | ;Haihong Huang;Dali Yin;Chun Li;Bin Wang;Gang Zhang;Zhenkun Ma;Fei Wang;Chen Ma;Meiqin Zheng;Xuan Li;Yu Lu;Dongfeng Zhang;Tianming Yang;Kai Liu;Binna Liu |
| Journal | Journal of ethnopharmacology |
| Year | 2012 |
| DOI |
10.3390/molecules17044545
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| URL | |
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