電気化学的手法によるニッケルの活性化とその有機反応への利用
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A highly reactive nickel powder like Riekes nickel can be prepared by electrolysis of a DMF solution containing 0.3 mol·dm<SUP>-3</SUP> Bu<SUB>4</SUB>NBF<SUB>4</SUB> or 0.3 mol·dm<SUP>-3</SUP> Et<SUB>4</SUB>NBF<SUB>4</SUB> in an undivided cell with a platinum cathode and a nickel anode without massive deposition onto the cathode at a constant current of 10 mA/cm<SUP>2</SUP> at 0 °C under an argon atmosphere. The transmission electron micrograph of the electrochemically generated nickel powder shows the particle size to be 2-3 nm. The Ullmann-type reaction of aryl halides with the reactive nickel proceeded with approximately the same yields as those using Riekes metal. Therefore, the electrochemically generated nickel powder has enough activity for reduction of nitrobenzenes and deallylation of allyl aryl ethers. These reactions proceeded without affecting various functional groups at room temperature in a short reaction time.
- 社団法人 有機合成化学協会の論文
- 2000-03-01
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