Fluoro-functionalized polymeric N-heterocyclic carbene-zinc complexes: efficient catalyst for formylation and methylation of amines with CO2 as a C1-building block
作者： Zhen-Zhen Yang , Bo Yu , Hongye Zhang , Yanfei Zhao , Guipeng Ji
DOI: 10.1039/C5RA00380F
关键词:
摘要: A fluoro-functionalized polymeric N-heterocyclic carbene (NHC)-Zn complex (F-PNHC-Zn) was designed and synthesized by taking fluorous imidazolium salts as precursors through a two-step alkylation. The resultant F-PNHC-Zn applied in catalyzing the formylation methylation of amines using CO2 C1 building block presence organosilane, which showed much higher activity than corresponding non-fluorous PNHC-Zn under identical conditions. N-Methylanilines with both electron-withdrawing electron-donating groups all could be converted to formamides methylamines >90% conversion. Quantitative conversion N-methylaniline obtained even very low pressure (0.05 MPa diluted N2). Moreover, highly stable easily recyclable for these reactions.
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