Effect of halogen bonding interaction on supramolecular assembly of halogen-substituted phenylpyrazinamides
作者:Hamid Reza Khavasi、Alireza Azhdari Tehrani
DOI:10.1039/c3ce40093j
日期:——
A series of halogen-substituted phenylpyrazinamides have been synthesized and crystallographically characterized in order to investigate the effect of halogen bonding interaction on supramolecular assembly of N-phenylpyrazine-2-carboxamide derivatives. The notable feature in crystal structures of meta- and para-iodinated, brominated and chlorinated compounds is that there is a tendency to form a halogen bonding synthon between adjacent halophenyl and prazine/halophenyl rings. Influence of these halogen bonding interactions on supramolecular assemblies have been discussed with the help of geometrical analysis and theoretical calculations. The X⋯N halogen bonding distances are 2.2–7.7% shorter than the sum of the van der Waals radii of the nitrogen and halogen atoms. Also, theoretical methods show the N⋯X halogen bonding energies within a range of −9.43 to −23.67 kJ mol−1. Our studies show that the selection of halogen atom as well as the position of substitution on phenylpyrazinamide compound may be important for crystal design based on halogen bonding.
Synthesis of pyrazinamide analogues and their antitubercular bioactivity
作者:First A. Wati、Prisna U. Adyarini、Sri Fatmawati、Mardi Santoso
DOI:10.1007/s00044-020-02626-0
日期:2020.12
the Yamaguchi reagent, 4-dimethylaminopyridine, and triethylamine. Pyrazinamide is a crucial first-line drug for tuberculosis treatment, therefore their analogues are interesting in organic synthesis. In general, the synthesis pyrazinamide analogues involve reaction of pyrazine-2-carboxylic acids with thionyl chloride to yield the corresponding acyl chlorides, which on treatment with amines gave py
Synthesis and Antitubercular Evaluation of<i>N</i>-Arylpyrazine and<i>N,N′</i>-Alkyl-diylpyrazine-2-carboxamide Derivatives
作者:Marcelle de Lima Ferreira Bispo、Raoni Schroeder Borges Gonçalves、Camilo Henrique da Silva Lima、Laura Nogueira de Faria Cardoso、Maria Cristina Silva Lourenço、Marcus Vinícius Nora de Souza
DOI:10.1002/jhet.921
日期:2012.11
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
prepared compounds were characterized and evaluated for their antimycobacterial and antifungal activity, and for their ability to inhibit photosynthetic electron transport (PET). 6-Chloro-N-(4-chlorophenyl)pyrazine-2-carboxamide manifested the highest activity against Mycobacterium tuberculosis strain H37Rv (65% inhibition at 6.25 μg/mL). The highest antifungal effect against Trichophyton mentagrophytes