Synthesis of 3-Substituted 2-Aminopyridines via Displacement of 3-Fluoro-2-nitropyridine
摘要:
An efficient method for the substitution of 3-fluoro-2-nitropyridine with a range of nitrogen-containing heterocycles and aliphatic amines is described. The reaction proceeds in a regioselective manner at moderate temperature and in reasonable yield.
An efficient method for the substitution of 3-fluoro-2-nitropyridine with a range of nitrogen-containing heterocycles and aliphatic amines is described. The reaction proceeds in a regioselective manner at moderate temperature and in reasonable yield.
Practical Amination of Nitropyridones by Silylation
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.