3.4.12. (E)-3-((E)-3-(4-Methoxyphenyl)-1-(4-nitrophenyl)allylidene)-1-methylindolin-2-one (**3cd**)

82% Yield; orange solid; mp = 197.0 ◦C; *R*<sup>f</sup> = 0.23 (silica gel, hexanes:EtOAc = 4:1); 1H NMR (500 MHz, CDCl3): *δ* 9.27 (d, *J* = 16.2 Hz, 1H), 8.43 (dt, *J* = 13.0, 2.3 Hz, 2H), 7.50 (dt, *J* = 13, 2.3 Hz, 2H), 7.46 (d, *J* = 8.8 Hz, 2H), 7.13 (td, *J* = 7.7, 0.9 Hz, 1H), 6.9 (d, *J* = 8.8 Hz, 2H), 6.78 (d, *J* = 7.8 Hz, 1H), 6.60 (td, *J* = 7.7, 0.8 Hz, 1H), 6.26 (d, *J* = 16.2 Hz, 1H), 5.68 (,d *J* = 7.7 Hz, 1H), 3.82 (s, 3H), 3.30 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 167.8, 161.1, 148.6, 148.1, 144.9, 143.0, 141.4, 130.2, 129.7, 129.4, 128.8, 124.8, 124.7, 123.1, 122.8, 121.8, 121.7, 114.5, 108.0, 55.5, 25.9 ppm; HRMS (EI): calcd for C25H20N2O4 [M+]: 412.1423, found 412.1422.
