Synthesis of Urea Derivatives from CO
<sub>2</sub>
and Silylamines
作者:Maotong Xu、Andrew R. Jupp、Maegan S. E. Ong、Katherine I. Burton、Saurabh S. Chitnis、Douglas W. Stephan
DOI:10.1002/anie.201900058
日期:2019.4.16
A series of thirty‐three N,N′‐diaryl, dialkyl, and alkyl‐aryl ureas have been prepared in pyridine or toluene by reaction of silylamines with CO2. This protocol is shown to provide facile access to 13C‐labeled ureas, as well as chiral and macrocyclic ureas. These reactions proceed through initial generation of the corresponding silylcarbamates, which subsequently react with silylamine under thermal
通过使甲硅烷基胺与CO 2反应,在吡啶或甲苯中制备了33种N,N'-二芳基,二烷基和烷基芳基尿素。已显示该协议可轻松访问13 C标记的尿素以及手性和大环脲。这些反应通过首先产生相应的甲硅烷基氨基甲酸酯来进行,随后在热条件下与甲硅烷基胺反应,以提供热力学上有利的脲和二甲硅烷基醚。