Chloroacetaldehyde → 6-Bromoimidazo[1,2-a]pyridine
反応式
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][N:3]=1.Cl[CH2:10][CH:11]=O.C(=O)(O)[O-].[Na+]>C(#N)C>[Br:8][C:5]1[CH:6]=[CH:7][C:2]2[N:3]([CH:10]=[CH:11][N:1]=2)[CH:4]=1参加物
5
実験手順
Reflux a solution of 2-amino-5-bromo-pyridine (Maybridge; 1.0 g, 5.78 mmol), 50% aqueous chloroacetaldehyde (2 mL, 12.7 mmol) in acetonitrile (100 mL) for 14 h. Dilute the reaction with saturated aqueous sodium bicarbonate and extract into ethyl acetate. Flash chromatography using appropriate ethyl acetate/hexane mixtures gives 0.95 g (83%) of the subtitled compound as a tan solid. MS (electrospray, m/z) 196.7, 198.7 (M+1). 1H NMR (400 MHz, DMSO-d6) δ 8.9 (d, J=1.5 Hz, 1H), 7.90 (s, 1H), 7.58 (d, J=1.5 Hz, 1H), 7.53 (d, J=9.2 Hz, 1H), 7.29 (dd, J=9.2, 2 Hz, 1H).
後処理
- additionDilute
- extractionextract into ethyl acetate
出典と根拠
- ORDレコード
- ord-069c7d4bb27b457280b6c6a1be464f9a
- 出典データセット
- uspto-grants-2008_07
- 特許番号
- US07405299B2
反応ノート
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