Polynuclear Gold [Au<sup>I</sup>
]<sub>4</sub>
, [Au<sup>I</sup>
]<sub>8</sub>
, and Bimetallic [Au<sup>I</sup>
<sub>4</sub>
Ag<sup>I</sup>
] Complexes: C−H Functionalization of Carbonyl Compounds and Homogeneous Carbonylation of Amines
作者:Ekaterina S. Smirnova、José M. Muñoz Molina、Alice Johnson、Nuno A. G. Bandeira、Carles Bo、Antonio M. Echavarren
DOI:10.1002/anie.201603200
日期:2016.6.20
tetranuclear gold complexes, a structurally unprecedented octanuclear complex with a planar [Au(I) 8 ] core, and pentanuclear [Au(I) 4 M(I) ] (M=Cu, Ag) complexes is presented. The linear [Au(I) 4 ] complex undergoes C-H functionalization of carbonyl compounds under mild reaction conditions. In addition, [Au(I) 4 Ag(I) ] catalyzes the carbonylation of primary amines to form ureas under homogeneous conditions
Selective hydrolysis of carbonimidodithioates (3) leads to the thiocarbamates (4), which can be easily transformed to the unsymmetricalureas (5) by treatment with the appropriate amines. This constitutes a synthesis of ureas without the use of phosgene or carbonmonoxide.