*(E)-3-(4-fluorophenyl)-5-(4-styrylphenyl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde (***3d***)*

Mp = 157 ◦C; Rf = 0.86; 1H NMR (300 MHz, ppm, DMSO-*d*6): 8.86 (s, 1H, −CHO); 7.85–7.80 (m, 2H, arom.), 7.44–7.42 (m, 2H, arom.), 7.34–7.28 (m, 5H, arom.), 6.60–6.56 (d, 1H, styryl), 6.36–6.28 (q, 1H, styryl), 5.20–5.12 (m, 1H, CH-pyr.), 3.73–3.64 (m, 1H, −CH2−pyr.), 3.29–3.22 (m, 1H, CH2-pyr.); 13C NMR (DMSO-*d*6) δ (ppm): 165.4, 162.2, 160.3, 156.1, 136.2, 135.4, 134.4, 134.1, 132.9, 131.3, 129.9, 129.6, 129.4, 129.1, 128.3, 128.1, 127.7, 127.2, 126.9, 116.5, 116.2, 57.7; *m*/*z* calcd for [C24 H19FN2O]+ ([M+H]+/ M++ H+Na): 370.42, found 371.3/393.20.
