Reaction Steps
To a mixture of N,N-di[4-(4-nitrophenoxy)phenyl)]-7-(benzothiazol-2-yl)-9,9-diethyl-fluoren-2-amine (Example 11; 5.25 g, 6.6 mmol), DMAC (75 mL), ethanol (50 mL), and 10% palladium on charcoal catalyst (0.51 g) heated to 70° C., a mixture of hydrazine hydrate (4.9 mL), and ethanol (7 mL) was added in portions over 15 minutes. After two hours at 75° C., the mixture was cooled and poured into water. The separated solids were collected, and transferred to a column of silica gel. Elution with 3:1 toluene-ethyl-acetate mixture gave the product, 2.61 g (54% yield), m.p. 192-194° C. Recrystallization from a mixture of ethyl acetate and hexanes did not raise the m.p. Mass spec: m/z 736 (M+). Anal. Calcd. for C48H40N4O2S: C, 78.23%; H, 5.47%; N, 7.60%; S, 4.35%. Found: C, 78.23%; H, 5.56%; N, 7.55%; S, 4.41%. 1H NMR (CDCl3) δ ppm: 0.37 (t, 6H, 7.32 Hz), 1.88-1.97 (m, 2H), 2.03-2.11 (m, 2H), 3.57 (s, 4H), 6.64-6.73 (m, 4H), 6.85-6.92 (m, 8H), 6.94-6.98 (m, 1H), 7.00-7.10 (m, 5H), 7.36 (t, 1H, 8.16 Hz), 7.48 (t, 1H, 7.12 Hz), 7.55 (d, 1H, 8.28 Hz), 7.65 (m, 1H, 7.92 Hz), 7.89 (m, 1H, 7.6 Hz), 7.99 (dd, 1H, 1.6 and 7.92 Hz), 8.02-8.10 (m, 2H). 13C NMR (CDCl3) δ ppm: 8.58, 32.59, 56.29 (3 sp3C), 116.19, 116.64, 118.16, 119.09, 120.79, 120.84, 121.26, 121.37, 121.49, 122.86, 124.87, 125.81, 126.21, 127.22, 131.13, 134.12, 134.88, 142.36, 142.55, 144.64, 148.67, 148.86, 150.51, 152.06, 154.23, 154.53, and 168.90 (27 sp2C).
