3.4.7. (E)-3-((E)-1-(4-Chlorophenyl)-3-(4-nitrophenyl)allylidene)-1-methylindolin-2-one (**3bc**)

82% Yield; red solid; mp = >250 ◦C; *<sup>R</sup>*<sup>f</sup> = 0.50 (silica gel, hexane:EtOAc:CH2Cl2 = 4:1:1); 1H NMR (500 MHz, CDCl3): *<sup>δ</sup>* 9.53 (d, *<sup>J</sup>* = 16.2 Hz, 1H), 8.47 (d, *<sup>J</sup>* = 8.1 Hz, 2H), 8.18 (d, *J* = 8.3 Hz, 2H), 7.63 (d, *J* = 8.3 Hz, 2H), 7.53 (d, *J* = 8.1 Hz, 2H), 7.20 (t, *J* = 7.6 Hz, 1H), 6.80 (d, *J* = 7.6 Hz, 1H), 6.66 (t, *J* = 7.6 Hz, 1H), 6.30 (d, *J* = 16.2 Hz, 1H), 5.74 (d, *J* = 7.6 Hz, 1H), 3.31 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 167.5, 148.3, 147.8, 146.3, 143.9, 143.7, 142.8, 137.8, 130.8, 130.1, 128.3, 125.2, 125.0, 124.3, 123.8, 122.19, 122.15, 108.4, 26.1 ppm; HRMS (EI): calcd for C24H17N3O5 [M+] : 427.1168, found 427.1169.
