作者:Robert A. Singer、Michaël Doré
DOI:10.1021/op800201u
日期:2008.11.21
hexamethyldisilazane has been developed, avoiding the use of hazardous reagents such as POCl3. The activation of the pyridone by a nitro group is necessary for efficient coupling, leading to aminonitropyridines (3) in good yields. Regioisomers other than 3-nitro-4-pyridone (1) were found to be substantially less reactive but would undergo coupling with primary amines.
已开发出一种实用的方法,可通过用六甲基二硅氮烷处理将硝基吡啶酮(1)与伯胺偶联,从而避免使用有害试剂(如POCl 3)。吡啶基活化吡啶酮对于有效偶联是必要的,从而以良好的产率产生氨基硝基吡啶(3)。发现除3-硝基-4-吡啶酮(1)以外的区域异构体的反应性实质上较低,但会与伯胺偶联。