An Efficient Synthesis of 6-Nitro- and 6-Amino-3H-imidazo[4,5-b]pyridines by Cyclocondensation of 1-Substituted 1H-Imidazol-5-amines with 3-Nitro-4H-chromen-4-one
作者:Viktor Iaroshenko、Peter Langer、Dmytro Ostrovskyi、Andranik Petrosyan、Sergii Dudkin、Iftikhar Ali、Alexander Villinger、Andrei Tolmachev
DOI:10.1055/s-0030-1258538
日期:2010.9
The reaction of 3-nitro-4 H-chromen-4-onewith in situ generated 1-substituted 5-amino-1 H-imidazolesaffords a set of 1-substituted 6-nitro-3 H-imidazo[4,5- B]pyridines which represent potentialadenosine deaminase (ADA) inhibitors. Reduction of the nitro groupresults in the formation of the corresponding 6-amino-3 H-imidazo[4,5- B]pyridines.
3-nitro-4 H-chromen-4-one与原位反应生成1-取代的5-amino-1 H-imidazoles提供了一组1-取代的6-nitro-3 H-imidazo[4,5-B]代表潜在的腺苷脱氨酶 (ADA) 抑制剂的吡啶。硝基的还原导致相应的 6-amino-3 H-imidazo[4,5-B] 吡啶的形成。