An efficient cathodic carbonyl alkylation of aryl ketones or aldehydes with unactivated alkyl halides has been realized through the electrochemical activation of iron. The protocol is believed to include a radical–radical coupling or nucleophilic addition process, and the formation of ketyl radicals and alkyl radicals has been demonstrated. The protocol provides various tertiary or secondary alcohols
The Barbier−Grignard-Type Carbonyl Alkylation Using Unactivated Alkyl Halides in Water
作者:Charlene C. K. Keh、Chunmei Wei、Chao-Jun Li
DOI:10.1021/ja029649p
日期:2003.4.1
The aqueousBarbier-Grignard-typealkylation of aldehydes with unactivatedalkyl iodides and bromides was developed. By using a combination of zinc and cuprous iodide, catalyzed by indium(I) chloride, we successfully added tertiary, secondary, and primary alkylhalides to various aromatic aldehydes in 0.07 M aqueous Na2C2O4. A mechanistic rationale for the success of the reaction has been proposed
开发了醛与未活化的烷基碘和溴化物的水性 Barbier-Grignard 型烷基化反应。通过使用由氯化铟 (I) 催化的锌和碘化亚铜的组合,我们成功地将叔、仲和伯烷基卤化物添加到 0.07 M Na2C2O4 水溶液中的各种芳香醛中。已经提出了反应成功的机械原理。