3.4.11. (E)-3-((E)-1,3-Bis(4-nitrophenyl)allylidene)-1-methylindolin-2-one (**3cc**)

68% Yield; orange solid; mp = 243.5–245.2 ◦C; *<sup>R</sup>*<sup>f</sup> = 0.38 (silica gel, hexanes:EtOAc = 5:1); 1H NMR (500 MHz, CDCl3): *<sup>δ</sup>* 9.49 (d, *<sup>J</sup>* = 16.1 Hz, 1H), 8.16 (d, *<sup>J</sup>* = 8.7 Hz, 2H), 7.63 (d, *J* = 8.7 Hz, 2H), 7.57 (d, *J* = 8.2 Hz, 2H), 7.24 (d, *J* = 8.2 Hz, 2H), 7.17 (d, *J* = 7.6 Hz, 1H), 6.77 (d, *J* = 7.7 Hz, 1H), 6.68 (t, *J* = 7.6 Hz, 1H), 6.41 (d, *J* = 16.1 Hz, 1H), 5.88 (d, *J* = 7.7 Hz, 1H), 3.29 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 167.8, 148.0, 147.6, 143.5, 143.1, 137.8, 135.4, 135.0, 131.5, 130.2, 130.0, 129.6, 128.3, 125.1, 124.2, 124.1, 122.7, 122.1, 108.1, 26.0 ppm; HRMS (EI): calcd for C24H17ClN2O3 [M+] : 416.0928, found 416.0923.
