3.6.2. (E)-3-((E)-1-(4-Methoxyphenyl)-3-phenylallylidene)-1-methylindolin-2-one (**3da**)

90% Yield; yellow solid; mp = 153.6 ◦C; *R*<sup>f</sup> = 0.3 (silica gel, hexane:EtOAc = 4:1); 1H NMR (500 MHz, CDCl3): *δ* 9.36 (d, *J* = 16 Hz, 1H), 7.55 (d, *J* = 7.4 Hz, 2H), 7.32 (t, *J* = 7.4 Hz, 2H), 7.27 (d, *J* = 5.8 Hz, 1H), 7.21 (d, *J* = 8.5 Hz, 2H), 7.12 (t, *J* = 7.6 Hz, 1H), 7.08 (d, *J* = 8.5 Hz, 2H), 6.75 (d, *J* = 7.7 Hz, 1H), 6.65 (t, *J* = 7.6 Hz, 1H), 6.53 (d, *J* = 16 Hz, 1H), 5.92 (d, *J* = 7.7 Hz, 1H), 3.94 (s, 3H), 3.30 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 168.1, 159.8, 151.2, 142.8, 141.4, 137.0, 130.1, 129.9, 129.1, 128.8, 128.21, 128.19, 128.0, 123.64, 123.58, 122.8, 121.6, 114.7, 107.6, 55.5, 25.8 ppm; HRMS (EI): calcd for C25H21NO2 [M+]: 367.1572, found 367.1571.

3.6.3. (E)-3-((E)-3-(4-Chlorophenyl)-1-(4-methoxyphenyl)allylidene)-1-methylindolin-2-one (**3db**)

93% Yield; yellow solid; mp = 143.1 ◦C; *<sup>R</sup>*<sup>f</sup> = 0.36 (silica gel, hexane:EtOAc = 5:1); 1H NMR (500 MHz, CDCl3): *<sup>δ</sup>* 9.31 (d, *<sup>J</sup>* = 16.0 Hz, 1H), 7.45 (d, *<sup>J</sup>* = 8.5 Hz, 2H), 7.27 (d, *J* = 8.6 Hz, 2H), 7.19 (d, *J* = 8.6 Hz, 2H), 7.12 (t, *J* = 7.7 Hz, 1H), 7.07 (d, *J* = 8.6 Hz, 2H), 6.74 (d, *J* = 7.8 Hz, 1H), 6.65 (t, *J* = 7.8 Hz, 1H), 6.45 (d, *J* = 16.0 Hz, 1H), 5.92 (d, *J* = 7.7 Hz, 1H), 3.93 (s, 3H), 3.28 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 168.1, 159.9, 150.7, 142.9, 139.7, 135.6, 134.7, 130.1, 129.6, 129.04, 128.97, 128.7, 128.4, 123.7, 123.5, 123.2, 121.6, 114.7, 107.6, 55.5, 25.8 ppm; HRMS (EI): calcd for C25H20ClNO2 [M+]: 401.1185, found 401.1185.
