The phosphorus-nitrogen compounds, such as phosphoramides and thiophosphoramides were studied in viewpoint of their agrochemical delivery [1-4]. In the presence work, new phosphorus-nitrogen compounds were synthesized and used for the study of antifungal properties. The compounds, including (R)-[(2,3-F2)C6H3C(O)NH]P(O)[NHCH(CH3)C6H5]2 (1), (S)-[(2,3-F2)C6H3C(O)NH]P(O)[NHCH(CH3)C6H5]2 (2), and P[S][NHCH2C6H4-4-F]3 (3) were used in this study. Characterization was done by CHN analysis, Mass, IR and NMR spectroscopy. The 31P signals are revealed at 4.01 and 4.10 ppm for the phosphoramides 1 and 2, respectively and at 65.40 ppm for the thiophosphoramide 3. In the 1H NMR experiment, the broad signals at 9.42 ppm for 1 and 9.26 ppm for 2 associate to the NCP—H unit (NCP is the nitrogen atom of the C(O)NHP(O) segment), and the two other N—H protons appear as pseudo triplets at 4.88 and 5.06 ppm for 1 and 4.91 and 5.06 ppm for 2. For compound 3, the NH signal appears as a multiplet at 4.82 ppm. The 19F signals of compounds 1 and 2 are revealed as doublets at –138.52 and –140.26 ppm for 1 and –138.51 and –140.26 ppm for 2. For 3, the fluorine signal appears at –116.73 ppm. The antifungal properties of these compounds against phytopathogenic fungi such as Rhizoctonia solaniandFusarium culmorum were studied, which showed their effectiveness against both fungi. References [1] M. J. Domínguez, C. Sanmartín, M. Font, J. A. Palop, S. S. Francisco, O. Urrutia, F. Houdusse and J. M. Garcíamina, J. Agric. Food Chem., 2008, 56, 3721. [2] S. Jin, G. Yue, L. Feng, Y. Han, X. Yu and Z. Zhang, J. Agric. Food Chem., 2011, 59, 322. [3] K. Gholivand, A. A. Ebrahimi Valmoozi, H. R. Mahzouni, S. Ghadimi and R. Rahimi, J. Agric. Food Chem., 2013, 61, 6776. [4] M. Abbod, N. Safaie, K. Gholivand, M. Mehrabadi, M. Bonsaii and A.A. Ebrahimi Valmoozi, Chem. Biol. Technol. Agric., 2021, 8, 48.

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