Synthesis, Antifungal, Antibacterial and Antioxidant Activities of New Pyrazolo‐Triazaphophosphorin‐2‐Oxide Derivatives.

Abstract The current work describes the synthesis, characterization and antimicrobial evaluation of a new series of pyrazolo‐triazaphosphorine derivatives. The synthesized compounds were confirmed by NMR ( 1 H, 13 C, 31 P), IR spectroscopy, by elemental analysis and LCMS. The series of phosphorus products were screened for their antifungal activities and for their antibacterial activities. Finally, the antioxidant activity was tested for one of them (2a). The results were compared with biological activities of some drugs and demonstrate that the antibacterial and antifungal activities of 2 a – f , are influenced by the variation of the group R, R’ and the donor or attractor effects of the group R′. Likewise, the donor effect of the group in compound 2 e has a positive influence on the antifungal activity and 2 e reacts against Alternaria alternata with the lowest IC 50 =0.795 μg mL −1 than drug. The phosphorus products can be used as some antibacterial and antifungal agents and one of the compounds(2a) have an excellent antioxidant power.