作者:Robert J. Angelici
DOI:10.1016/j.jorganchem.2007.11.023
日期:2008.3
As in transition metal complexes, CN–R ligands adsorbed on powdered gold undergo attack by amines to give putative diaminocarbene groups on the gold surface. This reaction forms the basis for the discovery of a gold metal-catalyzed reaction of CN–R, primary amines (R′NH2) and O2 to give carbodiimides (R′–NCN–R). An analogous reaction of CO, RNH2, and O2 gives isocyanates (R–NCO), which react with additional
像在过渡金属络合物中一样,吸附在金粉上的CN–R配体会受到胺的攻击,从而在金表面上产生假定的二氨基卡宾基团。该反应为发现金金属催化CN–R,伯胺(R'NH 2)和O 2生成碳二亚胺(R'–NCN–R)的反应奠定了基础。CO,RNH 2和O 2的类似反应生成异氰酸酯(R–NCO),该异氰酸酯与其他胺反应生成脲(RNH)2 CO产品。CN-R与仲胺(HNR的金催化反应' 2)和O 2给出混合脲RNH(CO)NR' 2。在另一种金催化的反应中,仲胺HN(CH 2R)2被O反应2经历脱氢的亚胺产物,RCHN(CH 2 R)。特别令人感兴趣的是金粉的高催化活性,否则其以不良的催化性能而闻名。