The photochemistry of 2-hydroxyiminocyclododecanone
作者:Stewart McLean、James Wong、Peter Yates
DOI:10.1039/c39800000746
日期:——
Irradiation of (E)-2-hydroxyiminocyclododecanone (1) in methanolic solution through quartz with a medium-pressure mercury lamp gives (Z)-2-hydroxyiminocyclododecanone (2), 1-hydroxy-12-hydroxyiminobicyclo[8.2.0]dodecane (3), (2-oxocyclodecane)acetonitrile (6), and methyl undec-10-enoate (7); compounds (3), (6), and (7) are considered to be formed via Norrish type II processes.
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 nitrosatingreagent.