Lithiated 2-alkynyl-1,3-dioxanes as fully oxygenated acyl-anion equivalents Synthesis of 1-alkynyl ketones
作者:Klaas J.H. Kruithof、Robert F. Schmitz、Gerhard W. Klumpp
DOI:10.1016/s0040-4020(01)91548-0
日期:1983.1
2-Lithio-2-(trimethylsilylethynyl)-1,3-dioxane 3 is prepared from 2-(trimethylsilylethynyl)-1,3-dioxane with n-BuLi. Alkylation of 3 produces propargylic ketals 2 exclusively. Reaction with group IV-B chlorotrimethylimetalanes gives both propargylic products 2 and allenes 6 depending on the solvent used.
由2-(三甲基甲硅烷基乙炔基)-1,3-二恶烷与正丁基锂制备2-Lithio-2-(三甲基甲硅烷基乙炔基)-1,3-二恶烷3 。3的烷基化仅生成炔丙基缩酮2。与IV-B族氯三甲基亚金属氧烷的反应取决于所使用的溶剂而同时产生炔丙基产物2和烯丙基6。