1-Benzyl-3-((4-(methylthio)benzylidene)hydrazono)indolin-2-one (**6j**)

Orange solid (65%) mp = 177–178 ◦C. IR (KBr): νmax (cm−1): 2926 (C-H aliphatic), 1720 (C=O), 1606 (C=N). 1H NMR (DMSO-d6, 600 MHz: δ 2.49 (s, 3H, S-CH3), 4.97 (s, 2H, N-CH2-Ph), 7.01 (d, *J* = 7.8, 1H, ArH), 7.09 (t, 1H, ArH), 7.27 (m, 1H, ArH) 7.3–7.42 (m, 5H, ArH), 7.43 (d, *J* = 8.4, 2H, ArH), 7.92 (d, *J* = 7.8, 2H, ArH), 8.04 (d, *J* = 7.2, 1H, ArH), 8.70 (s, 1H, N=CH) ppm. 13C NMR (DMSO-d6, 150 MHz: δ 163.89, 162.07, 150.20, 145.41, 144.96, 136.51, 133.95, 130.01, 129.88, 129.20, 127.99, 127.72, 126.07, 123.55, 116.50, 110.54, 43.20 and 14.50 ppm. ESI mass m/z = 386 [M + H]<sup>+</sup>.
