Synthesis of new unsymmetric N,N′-dipyridylurea derivatives by selenium and selenium dioxide-catalyzed reductive carbonylation of substituted nitropyridines
作者:Jinzhu Chen、Gang Ling、Shiwei Lu
DOI:10.1016/j.tet.2003.08.035
日期:2003.10
Without using phosgene, a series of new unsymmetric N,N′-dipyridylurea derivatives have been synthesized in moderate to good yields by the one-pot reductivecarbonylation of substituted nitropyridines. These reactions utilize selenium or selenium dioxide as the catalyst, aminopyridine derivatives as co-reagents, and carbon monoxide as the carbonyl source.