62 Hz), 5.22 (s, 2H, CH2), 7.18 (d, 2H, Ar–H, J = 8.74 Hz), 7.23-7.31 (m, 4H, Ar–H), 7.63 (d, 2H, Ar–H, J = 8.72 Hz). 13C-NMR (90 MHz) (CDCl3) δ (ppm): 23.81, 25.91, 51.82, 71.09, 123.64, 124.10, 129.11, 129.87, 130.02, 133.27, 134.45, 137.27, 148.18,

170.64. IR (KBr, ν, cm−1): 3085, 2882, 2790, 1600, 1531, 1323, 809. Anal. Calc. for C20H20BrClN4S (%): C 51.79, H 4.35, N 12.08. Found: C 51.86, H 4.32, N 12.18. 4-(4-Bromophenyl)-5-(4-chlorophenyl)-2-(morpholin-4-ylmethyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (21) Yield: 80 %, m.p. 177–178 °C, 1H-NMR (250 MHz) (CDCl3) δ (ppm): 2.91 (t, 4H, 2 × CH2, J = 4.73 Hz), this website 3.73 (t, 4H, 2 × CH2, J = 4.70 Hz), 5.23 (s, 2H, CH2), 7.17 (d, 2H, Ar–H, J = 8.70 Hz), 7.25–7.34 (m, 4H, Ar–H), 7.64 (d, 2H, Ar–H, J = 8.70 Hz). IR (KBr, ν, cm−1): 3074, 3033, 2951, 2856, 1603, 1541, 1318, 798. Anal. Calc. for C19H18BrClN4OS (%): C 48.99, H 3.90, N 12.03. Found: C 49.10, H 3.97, N 12.00. Antibacterial screening Tested microorganism: S. aureus ATCC 25923, S. aureus Microbank 14001 (MRSA), Staphylococcus epidermidis ATCC 12228, B. subtilis ATCC 6633, B. cereus ATCC 10876, M. luteus ATCC 10240, E. coli ATCC 25922, K. pneumoniae ATCC 13883, P. mirabilis ATCC 12453, and P. aeruginosa

ATCC 9027. Preliminary antibacterial in vitro potency of the tested compounds was screened using the agar dilution method on the basis of the growth inhibition on the Mueller–Hinton agar to which the tested compounds at concentration 1,000 μg ml−1 Afatinib were added. The plates were poured on the day of testing. 10 μl of each bacterial suspension was put onto Mueller–Hinton agar containing the tested compounds; medium without the compounds

was used as a control. The plates were incubated at 37 °C for 18 h. Then the in vitro antibacterial activity of the compounds with inhibitory effect was determined by broth microdilution method. Ampicillin, cefuroxime, and vancomycin were used as control antimicrobial Oxalosuccinic acid agents. The microbial suspensions were prepared in sterile saline with an optical density of 0.5 McFarland standard—150 × 106 CFU ml−1 (CFU—colony forming unit). All stock solutions of the tested compounds were dissolved in DMSO. Mueller–Hinton broth was used with a series of twofold Niraparib in vivo dilutions of the tested substances in the range of final concentrations from 3.91 to 1,000 μg ml−1. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) are given in μg ml−1 (CLSI 2008). Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. References Almajan GL, Barbuceanu SF, Almajan ER, Draghici C, Saramet G (2009) Synthesis, characterization and antibacterial activity of some triazole Mannich bases carrying diphenylsulfone moieties.