1-Benzyl-3-((E)-(3-bromobenzylidene)hydrazono)indolin-2-one (**6e**)

Orange solid (52%) mp = 173–174 ◦C. IR (KBr): νmax (cm−1): 2920 (C-H aliphatic), 1720 (C=O), 1624 (C=N), 1573 (C=N). 1H NMR (DMSO-d6, 600 MHz: δ 4.97 (s, 2H, N-CH2-Ph), 7.01 (d, *J* = 8.4, 1H, ArH), 7.09 (t, 1H, ArH), 7.25 (m, 1H, ArH), 7.24–7.38 (m, 4H, ArH), 7.41 (t, 1H, ArH), 7.54 (t, 1H, ArH), 7.79 (d, *J* = 8.4, 1H, ArH), 7.86 (d, *J* = 7.8, 1H, ArH), 8.02 (d, *J* = 7.8, 1H, ArH), 8.12 (s, 1H, ArH), 8.60 (s, 1H, N=CH) ppm. 13C NMR (DMSO-d6, 150 MHz: δ 163.60, 158.67, 149.59, 145.61, 136.43, 136.10, 135.22, 134.12, 132.07, 131.88, 129.21, 129.10, 128.01, 127.73, 127.66, 123.65, 122.86, 116.20, 110.67 and 43.25 ppm. ESI mass m/z = 418 [M(79Br) + H]<sup>+</sup>, 420 [M(81Br) + H]<sup>+</sup>.
