Asymmetric Synthesis of Diverse Glycolic Acid Scaffolds via Dynamic Kinetic Resolution of α-Keto Esters
作者:Kimberly M. Steward、Michael T. Corbett、C. Guy Goodman、Jeffrey S. Johnson
DOI:10.1021/ja3102709
日期:2012.12.12
The dynamickineticresolution of α-keto esters via asymmetric transfer hydrogenation has been developed as a technique for the highly stereoselective construction of structurally diverse β-substituted-α-hydroxy carboxylic acid derivatives. Through the development of a privileged m-terphenylsulfonamide for (arene)RuCl(monosulfonamide) complexes with a high affinity for selective α-keto ester reduction
Unexpected Iodine-Promoted Aerobic Oxidation of α-Cyano-δ-keto Esters: A Facile Synthesis of α,δ-Dicarbonyl Esters
作者:Ze Zhang、Hui Xu、Ming-Yue Weng、Hong Chen
DOI:10.1055/s-0040-1707996
日期:2020.6
An efficient and green method for the synthesis of various α,δ-dicarbonyl esters has been developed via a conjugate addition of ethyl cyanoacetates to chalcones and subsequent iodine-promoted aerobic oxidation. The present protocol features mild reaction conditions, high efficiency, easily available starting materials, and broad substrate scope.