作者:Changjiang Ding、Rui Zhang、Baochang Gao、Dewen Dong、Jie Zhang、Chunming Dong、Yongjiu Liang
DOI:10.1055/s-0031-1289633
日期:2012.1
A facile and efficient one-pot synthesis of substituted thieno[2,3-b]pyridines has been developed. Treatment of enaminones, such as 2-acetyl-3-(dimethylamino)propenamides and -propenoates, with 2-cyanothioacetamide in the presence of potassium carbonate in N,N-dimethylformamide at 80 ˚C followed by addition of methylene-active bromides at room temperature provided, via intramolecular cyclization,
已经开发了一种简便,高效的一锅法合成取代的噻吩并[2,3- b ]吡啶。在80°C下于N,N-二甲基甲酰胺中的碳酸钾存在下,用2-氰基硫代乙酰胺处理2-氨基-3-(二甲基氨基)丙烯酰胺和-丙烯酸酯等烯胺酮,然后在室温下添加亚甲基活性溴化物通过分子内环化提供2,3,5,6-四取代的噻吩并[2,3- b ]吡啶的温度为78-90%。该方案结合了噻吩并[2,3- b ]吡啶环的构建和修饰,增加了最终材料的结构多样性,这些最终产品来自易于获得的材料。 烯胺酮-环化-杂环-吡啶-2(1 H)-硫酮-噻吩并[2,3- b ]吡啶