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铝汞齐

铝汞齐(Aluminium amalgam)是在金属中的溶液

性质

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中性。与水激烈反应,放出氢气

制取

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无油铝丝(片)用稀氢氧化钠洗净到强烈放出氢气时,用水粗洗一次,然后用0.5%氯化汞溶液处理一至两分钟。重复上述过程一次,即得汞齐化的光亮金属丝(片)。依次用水、乙醇乙醚快速冲洗后,即可立即使用。现用现制。[1][2]

也可用需要还原的底物与铝箔、氯化汞、无水乙醇和干燥的无硫苯溶剂回流,直接完成底物的还原反应。

用途

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用作还原剂,特别适用于对碱敏感的羰基化合物的还原,如酮酸酯、烷基芳基酮还原成相应的醇酸酯和嚬哪醇;脱除不饱和碳上的磺酰基等。[3]

参见

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参考资料

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  1. ^ Ward Chesworth. Use of aluminum-amalgam in mineral synthesis at low temperatures and 1 atmosphere total pressure (PDF). Clays and Clay Minerals. 1971, 19: 337–339 [2009-10-02]. doi:10.1346/CCMN.1971.0190510. (原始内容存档 (PDF)于2011-05-16). 
  2. ^ Lourdes Muñoz, Esmeralda Rosa, Ma Pilar Bosch and Angel Guerrero. A new, practical and efficient sulfone-mediated synthesis of trifluoromethyl ketones from alkyl and alkenyl bromides. Tetrahedron Letters. 2005, 46 (19): 3311–3313. doi:10.1016/j.tetlet.2005.03.106. 
  3. ^ 黄枢等编著. 有机合成试剂制备手册. 成都: 四川工业出版社. 1988年8月: 8–9. ISBN 7-5614-0066-7. 
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铝汞齐
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