Efficient Synthesis of γ‐Keto Esters from Enamines and EDA
作者:Dan Huang、Ming Yan、Wei‐Jie Zhao、Qi Shen
DOI:10.1081/scc-200050387
日期:2005.3.1
Abstract The reaction of enamines with ethyldiazoacetate (EDA) catalyzed by dirhodium and copper complexes provided γ‐keto esters in good yields. The influences of catalyst, reaction solvent, temperature, and structure of enamines on this transformation were investigated.
New reaction of enamines with aryldiazoacetates catalyzed by transition metal complexes
作者:Wei-Jie Zhao、Ming Yan、Dan Huang、Shun-Jun Ji
DOI:10.1016/j.tet.2005.03.093
日期:2005.6
The reaction of aryldiazoacetates with enamines catalyzed by copper and rhodium complexes provided γ-keto esters in good yields. A full investigation of the effects of solvents, catalysts, enamines and aryldiazoacetates on the reaction was carried out. Careful analysis of the crude reaction mixture revealed a substituted enamine as the primary product, which was hydrolyzed over silica gel to give a
An enantioselective Brønsted acid catalyzed enamine Mannich reaction
作者:A. Louise Tillman、Darren J. Dixon
DOI:10.1039/b616143j
日期:——
An enantioselective Bronsted acid catalyzed Mannich reaction between acetophenone derived enamines and N-Boc imines has been developed. Simple diol (S)-H(8)-BINOL has been identified as the optimal catalyst, to afford versatile beta-amino aryl ketones in good yield and enantiomeric excess.