Retention of Configuration in Photolytic Decarboxylation of Peresters to Form Chiral Acetals and Ethers
作者:M. Daniel Spantulescu、Marc A. Boudreau、John C. Vederas
DOI:10.1021/ol802745n
日期:2009.2.5
Peresters generate ethers in good yields when photolyzed in the absence of solvent using short wavelength UV light. At −78 °C or below, the process proceeds predominantly with retention of configuration at the site adjacent to the carbonyl where the decarboxylation occurs, but increase in temperature results in loss of stereochemical control. Chiral acyclic acetals can be prepared using precursors
Intermolecular O-H Insertion Reactions of l-Tartrate Derived α-Diazo Ketones: Synthesis of Xylulose Derivatives
作者:Saumitra Sengupta、Debasis Das
DOI:10.1055/s-2000-6338
日期:——
BF3 · OEt2 or Ru-catalyzed intermolecular O-H insertion reactions of l-tartrate derived α-diazo ketones have given rise to a new synthesis of xylulose derivatives.