Difluoro-and Trifluoromethylation of Electron-Deficient Alkenes in an Electrochemical Microreactor.

Difluoro-and Trifluoromethylation of Electron-Deficient Alkenes in an Electrochemical Microreactor.
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DOI:
10.1002/open.201300039
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发表时间:
2014-02
期刊:
影响因子:
2.3
通讯作者:
Wirth, Thomas
Wirth, Thomas
中科院分区:
化学3区
文献类型:
--
作者:
Arai, Kenta;Watts, Kevin;Wirth, Thomas

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由于扩散距离短的固有特性,将电极集成到流路中的电化学微反应器可以在不使用氧化还原试剂的情况下进行快速有效的电化学反应。利用电化学微反应器,在室温、恒电流、连续流动条件下,对不同缺电子烯烃存在下的二氟乙酸和三氟乙酸进行了Kolbe电解.其结果是,二-和三氟甲基化的化合物有效地生产在相同的反应,或相等或更高的产率下分批条件下Uneyamas组先前报道。采用电化学微反应器技术的策略是有效的氟甲基化的烯烃基于柯尔贝电解在显着缩短反应时间。
Electrochemical microreactors, which have electrodes integrated into the flow path, can afford rapid and efficient electrochemical reactions without redox reagents due to the intrinsic properties of short diffusion distances. Taking advantage of electrochemical microreactors, Kolbe electrolysis of di-and trifluoroacetic acid in the presence of various electron-deficient alkenes was performed under constant current at continuous flow at room temperature. As a result, di-and trifluoromethylated compounds were effectively produced in either equal or higher yields than identical reactions under batch conditions previously reported by Uneyamas group. The strategy of using electrochemical microreactor technology is useful for an effective fluoromethylation of alkenes based on Kolbe electrolysis in significantly shortened reaction times.
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