*3-(4-fluorophenyl)-5-(3-methoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde (***3e***)*

Mp = 143–145 ◦C; Rf = 0.83; 1H NMR (300 MHz, ppm, DMSO-*d*6): 8.91 (s, 1H, −CHO); 7.86–7.83 (m, 2H, arom.), 7.33–7.25 (m, 3H, arom.), 7.33–7.31 (m, 2H, arom.), 6.86–6.84 (m, 1H, arom.), 6.80–6.78 (m, 2H, arom.), 5.53–5.50 (m, 1H, CH-pyr.), 3.93–3.88 (m, 1H, −CH2-pyr.), 3.74 (s, 3H, OCH3), 3.23–3.19 (m, 1H, CH2-pyr.); 13C NMR (DMSO-*d*6) δ (ppm): 164.2, 162.5, 159.6, 159.5, 155.2, 142.8, 129.9, 129.1 (d, *J* = 2.40 Hz), 127.3, 117.5, 115.9, 115.8, 112.7, 111.6, 58.5, 52.0, 42.4; *m*/*z* calcd for [C17 H15FN2O2]+ ([M+H]+/ M++ H+Na): 298.31, found 299.0/321.20.

*3-(4-fluorophenyl)-5-(2-hydroxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde (***3f***)*

Mp = 204–206 ◦C; Rf = 0.74; 1H NMR (300 MHz, ppm, DMSO-*d*6): 9.74 (s, 1H, OH), 8.91 (s, 1H, −CHO); 7.85–7.80 (m, 2H, arom.), 7.32–7.26 (m, 2H, arom.), 7.33–7.31 (m, 2H, arom.), 7.12–7.07 (t, 1H, arom.), 6.95–6.92 (d, 1H, arom.), 6.86–6.83 (d, 1H, arom.), 6.76–6.71 (t, 1H, arom.), 5.64–5.58 (m, 1H, CH-pyr.), 3.90–3.80 (m, 1H, −CH2-pyr.), 3.12–3.05 (m, 1H, CH2-pyr.); 13C NMR (DMSO-*d*6) δ (ppm): 165.4, 162.1, 160.0, 156.1, 154.6, 129.5 (d, *J* = 8.78 Hz), 128.9, 128.1, 128.0, 127.0, 126.8, 119.3, 116.5, 116.2, 115.9, 53.4; *m*/*z* calcd for [C16H13FN2O2]+ (M++H+Na): 284.29, found 307.22.
