*5-(4-bromophenyl)-3-(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde (***3h***)*

Mp = 144 ◦C; Rf = 0.85; 1H NMR (300 MHz, ppm, DMSO-*d*6): 8.89 (s, 1H, −CHO); 7.85–7.83 (m, 2H, arom.), 7.55–7.53 (d, 2H, arom.), 7.33–7.30 (m, 2H, arom.), 7.22–7.20 (d, 2H, arom.), 5.55–5.52 (m, 1H, CH-pyr.), 3.94–3.89 (m, 1H, −CH2-pyr.), 3.25–3.21 (m, 1H, CH2-pyr.); 13C NMR (DMSO-*d*6) δ (ppm): 164.2, 162.5, 159.7, 155.2, 140.6, 131.6, 129.2, 129.1, 128.1, 127.3, 120.5, 115.9, 115.8, 58.1, 42.1; *m*/*z* calcd for [C16H12BrFN2O]+ (M++H+Na): 347.18, found 369.00.
