3.5.5. (E)-3-(3-Hydroxy-1,3-bis(4-methoxyphenyl)propylidene)-1-methylindolin-2-one (**8dd**)

63% Yield; orange foam; *R*<sup>f</sup> = 0.14 (silica gel, hexane:EtOAc:CH2Cl2 = 4:1:1); 1H NMR (500 MHz, CDCl3): *δ* 7.41 (d, *J* = 8.0 Hz, 1H), 7.33 (d, *J* = 8.6 Hz, 2H), 7.21 (d, *J* = 7.7 Hz, 1H), 7.16 (t, *J* = 7.4 Hz, 1H), 7.02 (dd, *J* = 25.1, 8.3 Hz, 2H), 6.86 (d, *J* = 8.6 Hz, 2H), 6.79 (d, *J* = 7.7 Hz, 1H), 6.71 (t, *J* = 7.6 Hz, 1H), 6.37 (d, *J* = 7.7 Hz, 1H), 4.73 (d, *J* = 9.8 Hz, 1H), 4.48 (s, 1H), 4.37 (dd, *J* = 12.7, 10.7 Hz, 1H), 3.91 (s, 3H), 3.79 (s, 3H), 3.31 (s, 3H), 2.90 (dd, *J* = 12.8, 3.0 Hz, 1H) ppm; 13C NMR (125 MHz, CDCl3): *δ* 169.7, 160.3, 158.9, 156.2, 142.2, 137.9, 133.2, 130.6, 128.5, 128.1, 126.9, 126.2, 123.1, 122.8, 122.1, 115.0, 114.3, 113.9, 108.0, 73.6, 55.5, 55.4, 46.2, 26.2 ppm; HRMS (EI): calcd for C26H23NO3 [M-H2O]+ : 397.1678, found 397.1678.
