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Upstream product

• 98-97-5 2-pyrazylcarboxylic acid 
• 19847-10-0 pyrazinoyl chloride 
• 98-16-8 3-trifluoromethylaniline 

Relevant academic research and scientific papers

Synthesis and antitubercular evaluation of N-Arylpyrazine and N,Na-Alkyl-diylpyrazine-2-carboxamide derivatives

Two series of pyrazinamide (PZA) derivatives have been synthesized and evaluated for their in vitro antibacterial activity against Mycobacterium tuberculosis H37Rv. Some compounds exhibited minimum inhibitory concentration activity of 50-100 μg/mL, greater than the first line antituberculosis drug PZA in Alamar Blue assay (>100 μg/mL). The obtained activities can be considered promising results, which characterizes these compounds as good start points to development of new antitubercular agents.

Synthesis and antimycobacterial evaluation of substituted pyrazinecarboxamides

Unsubstituted, halogenated and/or alkylated pyrazine-2-carboxylic acid amides connected via -CONH- bridge with substituted anilines were synthesized using currently known synthetic pathways. The synthetic approach, analytical, spectroscopic, lipophilicity and biological data of 20 newly synthesized compounds are presented. Structure-activity relationships among the chemical structures, the antimycobacterial, antifungal, photosynthesis inhibiting and antialgal activity of the evaluated substituted N-phenylpyrazine-2-carboxamides are discussed. 5-tert-Butyl-6-chloro-N-(3-trifluoromethylphenyl)pyrazine-2-carboxamide (19) has shown the highest activity against Mycobacterium tuberculosis H37Rv (MIC = 3.13 μg/mL). The highest antifungal effect against Trichophyton mentagrophytes, the most susceptible fungal strain tested, was found for N-(3-trifluoromethylphenyl)pyrazine-2-carboxamide (14, MIC = 62.5 μmol/mL). The highest reduction of chlorophyll content in Chlorella vulgaris was found for pyrazine-2-carboxylic acid (3-trifluoromethylphenyl)amide (9, IC50 = 12.1 μmol/L).