4018
Liu, Wang, and Zhang
7.91–7.94 (2H, m), 7.40–7.50 (8H, m), 7.00 (1H, s). nmax(KBr)/cm21: 3095,
1723, 1696, 1592, 1490. m/z (%): 418 (Mþ, 0.10), 279 (1.98), 141, (32.77),
139 (100), 113 (7.02), 111 (22.40). Anal. C21H13Cl3O3. Calcd. C, 60.10; H,
3.12. Found C, 60.33; H, 3.13%.
4-Fluoro-benzoic acid 1,2-bis-(4-fluoro-phenyl)-2-oxo-ethyl ester
(2d): white solid, yield: 91%, m.p.: 172–1748C. dH: 8.10–8.14 (2H, m),
7.99–8.02 (2H, m), 7.52–7.55 (2H, m), 7.08–7.14 (6H, m), 7.01 (1H, s).
n
max(KBr)/cm21: 2983, 1724, 1698, 1600, 1509. m/z (%): 369 (Mþ 2 1,
0.07), 247 (3.09), 123 (100), 95, (23.53). Anal. C21H13F3O3. Calcd. C,
68.11; H, 3.54. Found C, 68.35; H, 3.51%.
4-Methoxy-benzoic acid 1,2-bis-(4-methoxy-phenyl)-2-oxo-ethyl ester
(2e): white solid, yield: 83%, m.p.: 130–1328C. dH: 8.05–8.08 (2H, m), 7.97–
7.99 (2H, m), 7.47–7.49 (2H, m), 7.00 (1H, s), 6.87–6.92 (6H, m), 3.85 (3H, s),
3.83 (3H, s), 3.79 (3H, s). nmax(KBr)/cm21: 2935, 2838, 1712, 1686, 1605,
1512. m/z (%): 406 (Mþ, 0.53), 271 (10.05), 135 (100), 107 (8.81), 77
(15.65). Anal. C24H22O6. Calcd. C, 70.92; H, 5.46. Found C, 70.68; H, 5.49%.
3-Methyl-benzoic acid 2-oxo-1,2-di-m-tolyl-ethyl ester (2f ): oil, yield:
61%. dH: 7.94–7.96 (2H, m), 7.86–7.88 (2H, m), 7.26–7.41 (8H, m), 7.07
(1H, s), 2.31 (3H, s), 2.26 (3H, s), 2.19 (3H, s). nmax(film)/cm21: 3030, 2922,
1719, 1697, 1605, 1588. m/z (%): 358 (Mþ, 0.21), 239 (8.32), 119 (100), 91
(31.83). Anal. C24H22O3. Calcd. C, 80.42; H, 6.19. Found C, 80.61; H, 6.19%.
1,2-Diphenyl-ethanone (3a):[17a] white solid, yield: 89%, m.p.: 54–558C
(lit. 58–608C). dH: 8.05–8.25 (5H, m), 7.29–7.53 (5H, m), 4.29 (2H, s).
n
max(KBr)/cm21: 3084, 2956, 1685, 1602, 1556, 1498. m/z (%): 196 (Mþ,
1.68), 105 (100), 91 (6.82), 77 (34.87). Anal. C14H12O. Calcd. C, 85.68; H,
6.16. Found C, 85.43; H, 6.19%.
1,2-Di-p-tolyl-ethanone (3b):[17a] white solid, yield: 90%, m.p.: 102–
1048C (lit. 98–1008C). dH: 7.83–7.85 (2H, m), 7.27–7.29 (2H, m), 7.09–
7.14 (4H, m), 4.20 (2H, s), 2.42 (3H, s), 2.38 (3H, s). nmax(KBr)/cm21
:
2920, 1683, 1604. m/z (%): 224 (Mþ, 1.04), 119 (100), 105 (3.43), 91
(36.82). Anal. C16H16O. Calcd. C, 85.68; H, 7.19. Found C, 85.39; H, 7.21%.
1,2-Bis-(4-chloro-phenyl)-ethanone (3c):[17b] white solid, yield: 94%,
m.p.: 111–1138C (lit. 112–1138C). dH: 7.92–7.94 (2H, m), 7.43–7.45 (2H,
m), 7.29–7.31 (2H, m), 7.17–7.19 (2H, m), 4.22 (2H, s). nmax(KBr)/cm21
:
2897, 1690, 1587, 1492. m/z (%): 264 (Mþ, 1.07), 141 (35.31), 139 (100),
127 (2.37), 125 (7.32), 113 (9.24), 111 (27.67). Anal. C14H10Cl2O. Calcd.
C, 63.42; H, 3.80. Found C, 63.51; H, 3.82%.
1,2-Bis-(4-fluoro-phenyl)-ethanone (3d):[17b] white solid, yield: 90%,
m.p.: 95–978C (lit. 96–978C). dH: 8.01–8.03 (2H, m), 6.94–7.39 (6H, m),
4.23 (2H, s). nmax(KBr)/cm21: 2926, 1682, 1602, 1509. m/z (%): 232 (Mþ,
1.21), 123 (100), 109 (13.41), 95 (32.12). Anal. C14H10F2O. Calcd. C, 72.41;
H, 4.34. Found C, 72.69; H, 4.31%.