3 years ago

Stoichiometric Reactions of CO2 and Indium-Silylamides and Catalytic Synthesis of Ureas

Stoichiometric Reactions of CO2 and Indium-Silylamides and Catalytic Synthesis of Ureas
Andrew R. Jupp, Maotong Xu, Douglas W. Stephan
The indium compounds In(N(SiMe3)2)2Cl⋅THF (2) and In(N(SiMe3)2)Cl2⋅(THF)n (3) were shown to react with CO2 to give [(Me3Si)2N)InX(μ-OSiMe3)]2 (X=N(SiMe3)2 4, Cl 5). 0.05–2.0 mol % of the species 3 acts as a pre-catalyst for the conversion of aryl and alkyl silylamines under CO2 (2–3 atm) to give the corresponding ureas in 70–99 % yields. A proposed mechanism is supported by experimental and computational data. Ureas from CO2: Indium amides react with CO2 in a stoichiometric manner. In addition, they are shown to catalyze the conversion of 15 silylamines under CO2 to give the corresponding ureas in 70–99 % yields.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201708921

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