Sodium Bicarbonate → HCID 178526231、化合物
反応式
ClC1C=C(C=CC=1)C([O-])=O.[Br:11][C:12]1[CH:13]=[C:14]2[CH:21]=[CH:20][NH:19][C:15]2=[N+:16]([OH:18])[CH:17]=1.C(=O)(O)[O-].[Na+]>O>[Br:11][C:12]1[CH:13]=[C:14]2[CH:21]=[CH:20][NH:19][C:15]2=[N+:16]([O-:18])[CH:17]=1参加物
4
実験手順
5-Bromo-1H-pyrrolo[2,3-b]pyridine (20 g, 0.1 mol) was suspended in 300 mL of NMP. A solution of 3-Chloroperbenzoic acid (40 g, 0.16 mol) in 100 mL NMP was added dropwise over 30 min. The solution was stirred at 23° C. for 1 h after which 600 mL of ether were added. The grey precipitate was filtered off and washed with ether to yield 18 g of 5-Bromo-7-hydroxy-1H-pyrrolo[2,3-b]pyridin-7-ium 3-chlorobenzoate. The filtrate was stirred with 250 mL saturated sodium bicarbonate solution and 250 mL water to give 5-Bromo-1H-pyrrolo[2,3-b]pyridine 7-oxide (4.3 g, 20.2 mmol). The filtered 5-Bromo-7-hydroxy-1H-pyrrolo[2,3-b]pyridin-7-ium 3-chlorobenzoate was suspended in 200 mL of water and 200 mL of saturated sodium bicarbonate solution and was vigorously stirred for 1 h. The grey solids were filtered and washed with water to give a second crop of 5-Bromo-1H-pyrrolo[2,3-b]pyridine 7-oxide (11.15 g, 52.3 mmol, 71% combined yield). 1H NMR (500 MHz, DMSO-d6) δ 12.68 (s, 1H), 8.39 (d, J=1.5 Hz, 1H), 7.9 (d, J=1.5 Hz, 1H), 7.5 (d, J=3.5 Hz, 1H), 6.54 (d, J=3.5 Hz, 1H). MS: m/z 212.9 (M+H+).