Pyrazine Alkylation with Aldehydes and Haloalkanes Using
<i>N,N’</i>
‐Bis(trimethylsilyl)‐1,4‐dihydropyrazine Derivatives
作者:Hayato Tsurugi、Minami Matsuno、Tomomi Kawakami、Kazushi Mashima
DOI:10.1002/ejoc.202200862
日期:2022.11.7
N,N’-Bis(trimethylsilyl)-1,4-dihydropyrazines serves as starting materials for introducing alkyl groups into the parent pyrazine skeletons upon combined with aldehydes and nBu4NF as well as electron-deficient alkyl halides. In this reaction, activation of the trimethylsilyl moiety by fluoride is the key step for generating electron-rich silicate intermediates, while reduction of electron-deficient
N,N' -Bis(trimethylsilyl)-1,4-dihydropyrazines 用作起始材料,用于在与醛和n Bu 4 NF 以及缺电子烷基卤化物结合时将烷基基团引入母体吡嗪骨架。在该反应中,氟化物对三甲基甲硅烷基部分的活化是生成富电子硅酸盐中间体的关键步骤,而缺电子烷基卤化物被1a还原产生自由基阳离子 [ 1a ]⋅ +以进一步形成 C-C 键.