3.4.9. (E)-1-Methyl-3-((E)-1-(4-nitrophenyl)-3-phenylallylidene)indolin-2-one (**3ca**)

80% Yield; yellow solid; mp = 228.2 ◦C; *R*<sup>f</sup> = 0.3 (silica gel, hexanes:EtOAc = 3:1); 1H NMR (500 MHz, CDCl3): *δ* 9.39 (d, *J* = 16.2 Hz, 1H), 8.45 (d, *J* = 8.8 Hz, 2H), 7.53–7.50 (m, 4H), 7.35–7.30 (m, 3H), 7.15 (td, *J* = 7.7, 1.1 Hz, 1H), 6.78 (d, *J* = 7.7 Hz, 1H), 6.62 (td, *J* = 7.7, 1.0 Hz, 1H), 6.30 (d, *J* = 16.2 Hz, 1H), 5.70 (d, *J* = 7.5 Hz, 1H), 3.31 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 167.7, 148.1, 148.0, 144.7, 143.2, 141.5, 136.5, 130.2, 129.6, 129.2, 123.0, 128.0, 126.8, 124.8, 123.3, 122.9, 122.6, 121.9, 108.1, 26.0 ppm; HRMS (EI): calcd for C24H18N2O3 [M+]: 382.1317, found 382.1318.

## 3.4.10. (E)-3-((E)-3-(4-Chlorophenyl)-1-(4-nitrophenyl)allylidene)-1-methylindolin-2-one (**3cb**)

79% Yield; orange solid; mp = 249.5 ◦C; *R*<sup>f</sup> = 0.34 (silica gel, hexanes:EtOAc = 5:1); 1H NMR (500 MHz, CDCl3): *δ* 9.37 (d, *J* = 16.2 Hz, 1H), 8.44 (dt, *J* = 12.9, 2.3 Hz, 2H), 7.50 (dt, *J* = 13.0, 2.3 Hz, 2H), 7.43 (d, *J* = 8.5 Hz, 2H), 7.30 (d, *J* = 8.6 Hz, 2H), 7.15 (td, *J* = 7.7, 0.9 Hz, 1H), 6.78 (d, *J* = 7.8 Hz, 1H), 6.62 (td, *J* = 7.7, 0.8 Hz, 1H), 6.23 (d, *J* = 16.2 Hz, 1H), 5.71 (d, *J* = 7.7 Hz, 1H), 3.30 (s, 3H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 167.6, 148.2, 147.5, 144.4, 143.3, 139.8, 135.4, 135.0, 130.2, 129.4, 129.3, 129.2, 129.1, 128.3, 127.3, 127.1, 124.8, 124.3, 123.4, 123.3, 122.5, 122.0, 108.2, 26.0 ppm; HRMS (EI): calcd for C24H17ClN2O3 [M+]: 416.0928, found 416.0928.
