作者:Riccardo Surmont、Bart De Corte、Norbert De Kimpe
DOI:10.1016/j.tetlet.2009.04.049
日期:2009.7
alpha-Chloro-1,2-diones and alpha-fluoro-1,2-diones were prepared from the corresponding alpha-chloroaldimines by a sequence of reactions involving cyanation to alpha-cyanoenamines, alpha-halogenation to form alpha-chloro-or alpha-fluoroimidoyl cyanides and addition of organolithium reagents across the nitrile moiety, followed by acidic hydrolysis. All steps are straightforward and occur without side reactions finally leading to regiospecifically chlorinated and fluorinated 1,2-diones in good yields. (c) 2009 Elsevier Ltd. All rights reserved.