Asymmetric Synthesis of α-Keto Esters via Cu(II)-Catalyzed Aerobic Deacylation of Acetoacetate Alkylation Products: An Unusually Simple Synthetic Equivalent to the Glyoxylate Anion Synthon
作者:Kimberly M. Steward、Jeffrey S. Johnson
DOI:10.1021/ol200649u
日期:2011.5.6
alpha-keto esters is described using a copper(II)-catalyzed aerobic deacylation of substituted acetoacetate esters. The substrates for the title process arise from catalytic, enantioselective conjugate additions and alkylation reactions of acetoacetate esters. The mild conditions do not induce racemization of the incipient enolizable alpha-keto ester. The reaction is tolerant of esters, certain ketones
使用取代的乙酰乙酸酯的铜(II)催化的好氧脱酰作用,描述了一种简单有效的制备β-立体异构α-酮酯的方法。标题方法的底物来自乙酰乙酸酯的催化,对映选择性共轭加成和烷基化反应。温和的条件不引起初始可烯醇化的α-酮酯的外消旋化。该反应可耐受酯,某些酮,缩酮和硝基,并利用廉价,易得的材料。