Bromine → HCID 10192904、化合物

反応式

[Br-:1].[K+].BrBr.[C:5]([O:8][C:9]1[C:16]([O:17][CH3:18])=[CH:15][CH:14]=[CH:13][C:10]=1[CH:11]=[O:12])(=[O:7])[CH3:6]>O>[C:5]([O:8][C:9]1[C:16]([O:17][CH3:18])=[CH:15][CH:14]=[C:13]([Br:1])[C:10]=1[CH:11]=[O:12])(=[O:7])[CH3:6]

参加物

実験手順

To a solution of potassium bromide (40 g) in H2O (250 mL) was added bromine (6.8 mL). To the dark red solution was added aldehyde 10 (20.2 g). The turbid orange solution was stirred overnight, filtered, rinsed with ethyl acetate, recrystallized from ethyl acetate/hexane to afford yellow crystals (22.4 g, 79%): m.p. 121.6-123.4° C., lit18 m.p. 119-120° C.; EIMS m/z 274 (M+, 81Br), 272 (M+, 79Br), 232, 230, 186, 184, 43; 1H NMR δ 10.26 (1H, s, CHO), 7.51 (1H, d, J=9.0 Hz, H4), 7.05 (1H, d, J=9.0 Hz H2, H4), 3.85 (3H, s, OCH3), 2.38 (3H, s, COCH3); 13C—NMR (75.5 MHZ) δ 190.38, 168.71, 151.78, 140.37, 131.41, 126.49, 117.69, 116.35, 56.40, 20.44. Anal. Calcd. For C10H9O4Br: C, 43.98; H, 3.32. Found: C, 44.46; H, 3.55.