A Practical and User-Friendly Method for the Selenium-Free One-Step Preparation of 1,2-Diketones and their Monoxime Analogs
作者:Georg Rüedi、Matthias A. Oberli、Matthias Nagel、Christophe Weymuth、Hans-Jürgen Hansen
DOI:10.1055/s-2004-832815
日期:——
Treatment of α-methylene ketones with excess sodium nitrite and aqueous HCl in THF at reduced temperatures provides an effective tool for the preparation of a variety of 1,2-diketones. The diastereoselective synthesis of the corresponding (Z)-1,2-dione monoximes could be accomplished under similar conditions, but by using only one equivalent of nitrosating reagent.
在低温下用过量的亚硝酸钠和 HCl 水溶液在 THF 中处理 α-亚甲基酮为制备各种 1,2-二酮提供了一种有效的工具。相应的 (Z)-1,2-二酮单肟的非对映选择性合成可以在类似条件下完成,但仅使用一当量的亚硝化试剂。