Formation of Five-Membered Cyclic Orthoesters from Tribromides with Participation of a Neighboring Carbonyl Group
作者:Guddeangadi N. Gururaja、Shaikh M. Mobin、Irishi N. N. Namboothiri
DOI:10.1002/ejoc.201100042
日期:2011.4
but synthetically useful γ-keto esters. The intermediacy of dihydrofurans in the one-pot transformation of keto tribromides into γ-keto esters provides evidence for the active participation of the neighboringcarbonylgroup in the alcoholysis of the tribromide moiety.
Single-Step Synthesis of γ-Ketoacids through a Photoredox-Catalyzed Dual Decarboxylative Coupling of α-Oxo Acids and Maleic Anhydrides
作者:Alex M. Davies、Shrikant S. Londhe、Emma R. Smith、Jon A. Tunge
DOI:10.1021/acs.orglett.3c03258
日期:2023.12.8
A photocatalytic methodology for the single step synthesis of γ-ketoacids from α-ketoacids has been developed. This method employs maleicanhydrides as traceless synthetic equivalents of acrylic acids, achieving a selective cross-coupling via a dual decarboxylative strategy, where molecular CO2 is released as the only waste byproduct. The method has also been expanded to incorporate a highly regioselective