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Amine‐Responsive Disassembly of AuI–CuI Double Salts for Oxidative Carbonylation
Authors:Yanwei Cao  Jian‐Gong Yang  Yi Deng  Shengchun Wang  Qi Liu  Chaoren Shen  Wei Lu  Chi‐Ming Che  Yong Chen  Lin He
Abstract:A sensitive amine‐responsive disassembly of self‐assembled AuI‐CuI double salts was observed and its utilization for the synergistic catalysis was enlightened. Investigation of the disassembly of Au(NHC)2]CuI2] revealed the contribution of Cu‐assisted ligand exchange of N‐heterocyclic carbene (NHC) by amine in Au(NHC)2]+ and the capacity of CuI2]? on the oxidative step. By integrating the implicative information coded in the responsive behavior and inherent catalytic functions of d10 metal complexes, a catalyst for the oxidative carbonylation of amines was developed. The advantages of this method were clearly reflected on mild reaction conditions and the significantly expanded scope (51 examples); both primary and steric secondary amines can be employed as substrates. The cooperative reactivity from Au and Cu centers, as an indispensable prerequisite for the excellent catalytic performance, was validated in the synthesis of (un)symmetric ureas and carbamates.
Keywords:carbamates  double salts  oxidative carbonylation  synergistic catalysis  urea
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