1-Benzyl-3-((3-methylbenzylidene)hydrazono)indolin-2-one (**6h**)

Pale orange solid (60%) mp = 138–139 ◦C. IR (KBr): νmax (cm−1): 2920 (C-H aliphatic), 1718 (C=O), 1670 (C=N), 1606 (C=N). 1H NMR (DMSO-d6, 600 MHz: δ 2.38 (s, 3H, Ph-CH3), 4.95 (s, 2H, N-CH2-Ph), 7.0 (d, *J* = 8.4, 1H, ArH), 7.07 (t, 1H, ArH), 7.22–7.42 (m, 7H, ArH), 7.45 (t, 1H, ArH), 7.76 (s, 1H, ArH), 7.78 (d, *J* = 7.8, 1H, ArH), 7.95 (d, *J* = 7.2, 1H, ArH), 8.85 (s, 1H, N=CH) ppm. 13C NMR (DMSO-d6, 150 MHz: δ 163.74, 161.14, 149.83, 145.45, 139.06, 136.46, 134.03, 133.75, 133.43, 129.98, 129.62, 129.19, 129.13, 129.10, 127.99, 127.71, 126.45, 123.60, 117.81, 116.34, 110.57, 43.19 and 21.35 ppm. ESI mass m/z = 354 [M + H]<sup>+</sup>.
