Palladium Complexes with N-Heterocyclic Carbene Ligands As Catalysts for the Alkoxycarbonylation of Olefins
作者:Gina M. Roberts、Philip J. Pierce、L. Keith Woo
DOI:10.1021/om300959f
日期:2013.3.25
Palladium catalysts, generated from Pd(OAc)2 and 2 equiv of N,N-dialkylbenzimidazolium iodide, are effective for the alkoxycarbonylation of olefins in high yields (>90%). Alkoxycarbonylation of 1-hexene in dimethylacetamide is achieved within 24 h at 110 °C using 1 mol % catalyst, 1000 psi CO, and ethanol. Reactions can be prepared in air, without the need of an acid additive to produce ethyl 2-methylhexanoate
由Pd(OAc)2和2当量的N,N-二烷基苯并咪唑碘化物生成的钯催化剂可有效地以高收率(> 90%)进行烯烃的烷氧基羰基化。使用1 mol%的催化剂,1000 psi CO和乙醇,在110°C下于24 h内实现1-己烯在二甲基乙酰胺中的烷氧基羰基化。可以在空气中进行反应,而无需酸添加剂即可以约2:1的比例生产2-甲基己酸乙酯和庚酸乙酯。