کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
50163 | 46783 | 2014 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Reactivity of 1,3-dimethylimidazolium-2-carboxylate with dimethylcarbonate at high temperature: Unexpected 2-ethyl-functionalisation of the imidazolium moiety and employment of the NHC-CO2/dimethylcarbonate system in a base promoted reaction Reactivity of 1,3-dimethylimidazolium-2-carboxylate with dimethylcarbonate at high temperature: Unexpected 2-ethyl-functionalisation of the imidazolium moiety and employment of the NHC-CO2/dimethylcarbonate system in a base promoted reaction](/preview/png/50163.png)
• Reactivity of 1,3-dimethylimidazolium-2-carboxylate with dimethylcarbonate
• Unexpected 2-ethyl-functionalization of the imidazolium moiety
• Synthesis and characterization of 2-ethyl-1,3-dimethylimidazolium methyl carbonate
• Synthesis and characterization of 2-ethyl-1,3-dimethylimidazolium-4-carboxylate
• Synthesis of 1,7-heptanedioic acid dimethyl ester
The reaction of 1,3-dimethylimidazolium-2-carboxylate and dimethylcarbonate (DMC) at high temperature yielded the new compounds 2-ethyl-1,3-dimethylimidazolium methyl carbonate salt and 2-ethyl-1,3-dimethylimidazolium-4-carboxylate zwitterion which were obtained as a mixture in approximately 4:1 molar ratio. The compounds were also isolated in pure form through alternative synthetic procedures and characterized by ESI-HRMS, 1H, 13C NMR and FTIR spectroscopy. The 1,3-dimethylimidazolium-2-carboxylate/dimethylcarbonate system was employed in the synthesis of 1,7-heptanedioic acid dimethyl ester from cyclohexanone and DMC. The target compound was obtained in 49% yield and 66% selectivity.
Reactivity of 1,3-dimethylimidazolium-2-carboxylate with dimethylcarbonate at high temperature: unexpected 2-ethyl-functionalisation of the imidazolium moiety and employment of the NHC-CO2/dimethylcarbonate system in a base promoted reaction.Figure optionsDownload as PowerPoint slide
Journal: Catalysis Communications - Volume 46, 10 February 2014, Pages 94–97