Efficient Synthesis of Ureas by Direct Palladium-Catalyzed Oxidative Carbonylation of Amines
作者:Bartolo Gabriele、Giuseppe Salerno、Raffaella Mancuso、Mirco Costa
DOI:10.1021/jo0494634
日期:2004.7.1
A general synthesis of symmetrically disubstituted ureas and trisubstituted ureas by direct Pd-catalyzed oxidativecarbonylation of primary amines or of a mixture of a primary and a secondary amine, respectively, with unprecedented catalytic efficiencies for this kind of process, is reported. Reactions are carried out at 90−100 °C in DME as the solvent in the presence of PdI2 in conjunction with an
Synthesis of Symmetrical Ureas by (Diacetoxyiodo)benzene-Induced Hofmann Rearrangement
作者:Markus Kalesse、Dirk Landsberg
DOI:10.1055/s-0029-1219566
日期:2010.4
Amides undergo Hofmann rearrangement by treatment with (diacetoxyiodo)benzene (DAIB) to provide symmetrical ureas in a simple and robust transformation.