Recently I am researching about MYCOBACTERIUM-TUBERCULOSIS; PRUSSIAN BLUE; NITROXYL; PYRAZINAMIDE; INSIGHTS; DRUG; ACTIVATION; MECHANISMS; RESISTANCE; NO, Saw an article supported by the CNPq/FAPERGS/CAPES/BNDES [421703-2017-2/17-1265-8/14.2.0914.1, CNPq 303355/2018-2, CNPq 308383/2018-4, Universal 403866/2016-2]; COFECUB Project [Ph-C 883/17]; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES)Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]. Published in SPRINGER in NEW YORK ,Authors: Carvalho, EM; Paulo, TD; Saquet, AS; Abbadi, BL; Macchi, FS; Bizarro, CV; Campos, RD; Ferreira, TLA; do Nascimento, NRF; Lopes, LGF; Chauvin, R; Sousa, EHS; Bernardes-Genisson, V. The CAS is 98-97-5. Through research, I have a further understanding and discovery of Pyrazine-2-carboxylic acid. SDS of cas: 98-97-5
A pharmacophore design approach, based on the coordination chemistry of an intimate molecular hybrid of active metabolites of pro-drugs, known to release active species upon enzymatic oxidative activation, is devised. This is exemplified by combining two anti-mycobacterial drugs: pyrazinamide (first line) and delamanid (third line) whose active metabolites are pyrazinoic acid (PyzCOOH) and likely nitroxyl (HNO (or NO.)), respectively. Aiming to generate those active species, a hybrid compound was envisaged by coordination of pyrazine-2-hydroxamic acid (PyzCONHOH) with a Na-3[Fe-II(CN)(5)] moiety. The corresponding pentacyanoferrate(II) complex Na-4[Fe-II(CN)(5)(PyzCONHO(-))] was synthesized and characterized by several spectroscopic techniques, cyclic voltammetry, and DFT calculations. Chemical oxidation of this complex with H(2)O(2)was shown to induce the release of the metabolite PyzCOOH, without the need of theMycobacterium tuberculosis(Mtb) pyrazinamidase enzyme (PncA). Control experiments show that both H2O2- and N-coordinated pyrazine Fe(II)species are required, ruling out a direct hydrolysis of the hydroxamic acid or an alternative oxidative route through chelation of a metal center by a hydroxamic group. The release of HNO was observed using EPR spectroscopy in the presence of a spin trapping agent. The devised iron metal complex of pyrazine-2-hydroxamic acid was found inactive against an actively growing/non-resistantMtbstrain; however, it showed a strong dose-dependent and reversible vasodilatory activity with mostly lesser toxic effects than the reference drug sodium nitroprussiate, unveiling thus a potential indication for acute or chronic cardiovascular pathology. This is a priori a further indirect evidence of HNO release from this metal complex, standing as a possible pharmacophore model for an alternative vasodilator drug.
About Pyrazine-2-carboxylic acid, If you have any questions, you can contact Carvalho, EM; Paulo, TD; Saquet, AS; Abbadi, BL; Macchi, FS; Bizarro, CV; Campos, RD; Ferreira, TLA; do Nascimento, NRF; Lopes, LGF; Chauvin, R; Sousa, EHS; Bernardes-Genisson, V or concate me.. SDS of cas: 98-97-5
Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem