کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5220917 | 1383403 | 2010 | 5 صفحه PDF | دانلود رایگان |
A convenient and efficient electrochemical method has been developed for the synthesis of the α-alkylidene cyclic carbonates from carbon dioxide (CO2) and propargyl alcohols at room temperature. The electrosynthesis was successfully carried out with a copper anode and a nickel cathode in an undivided cell containing n-Bu4NBr–MeCN electrolyte with a constant current under 3 MPa pressure of CO2, and the α-alkylidene cyclic carbonates were obtained in good to excellent isolated yields in the secondary and tertiary terminal propargylic alcohols cases. The experimental results show that the electrogenerated Cu+ ions and strong bases in situ could efficiently catalyze or promote the coupling reaction under the cooperation of electrolytic medium MeCN and supporting electrolyte n-Bu4NBr. The plausible mechanism of the coupling reaction was also discussed briefly.
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Journal: Tetrahedron - Volume 66, Issue 52, 24 December 2010, Pages 9981–9985