Citation:
Qun Cai, Mei-Cai Liu, Bi-Ming Mao, Xuan Xie, Feng-Cheng Jia, Yan-Ping Zhu, An-Xin Wu. Direct one-pot synthesis of zolimidine pharmaceutical drug and imidazo[1,2-a]pyridine derivatives via I2/CuO-promoted tandem strategy[J]. Chinese Chemical Letters,
;2015, 26(7): 881-884.
doi:
10.1016/j.cclet.2014.12.016
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An efficient one-pot synthetic protocol was developed for the synthesis of imidazo[1,2-a]pyridines from easily available starting materials: Aromatic ketones, α,β-unsaturated ketones, β-keto esters and 2- aminopyridines. The present reaction proceeded well in MeOH under the media of I2/CuO. By using this method, themarketed drug zolimidine could be prepared easily with 95% yield. All these target products were characterized by NMR, HRMS and IR spectra. Furthermore, the target compound 3fa was determined by X-ray crystallographic analysis.
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Keywords:
- 2-Aminopyridines,
- Aromatic ketones,
- Imidazo[1,2-a]pyridines,
- Zolimidine,
- One-pot
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