Generation of 2-Lithio-2-(trimethylsilyl)silacyclopentane and 2-Lithio-2-(phenylthio)silacyclopentane and Their Use for the Synthesis of 1,4-Butanediols and<i>γ</i>-Hydroxy Ketones
作者:Kozo Matsumoto、Toshiaki Yokoo、Koichiro Oshima、Kiitiro Utimoto、Noorsaadah Abd. Rahman
DOI:10.1246/bcsj.67.1694
日期:1994.6
2-(trimethylsilyl)silacyclopentane with t-butyllithium in THF–HMPA gave 2-lithio-2-(trimethylsilyl)silacyclopentane in good yield. An addition of alkyl iodides to the lithium compound provided 2-alkyl-2-(trimethylsilyl)silacyclopentanes which were converted into 1-alkyl-1,4-butanediols upon treatment with H2O2–KF and successively with n-Bu4NF. Reaction of 2-lithio-2-(trimethylsilyl)silacyclopentane with aldehydes
在 THF-HMPA 中用叔丁基锂处理 2-(三甲基甲硅烷基)硅杂环戊烷,以良好的收率得到 2-锂硫基-2-(三甲基甲硅烷基)硅杂环戊烷。向锂化合物中加入烷基碘可提供 2-烷基-2-(三甲基甲硅烷基)硅杂环戊烷,在用 H2O2-KF 和连续用 n-Bu4NF 处理后,它会转化为 1-烷基-1,4-丁二醇。2-锂硫-2-(三甲基甲硅烷基)硅杂环戊烷与醛反应生成2-亚烷基硅杂环戊烷,通过碳-硅键的氧化断裂将其转化为γ-羟基酮。衍生自 2-(苯硫基) 硅杂环戊烷和叔丁基锂的 2-Lithio-2-(苯硫基) 硅杂环戊烷在用醛处理后得到具有甲硅烷基烷基取代基的烯基硫化物。