Published in
Royal Society of Chemistry, Chemical Communications, 5, p. 632-634
DOI: 10.1039/b716485h
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Organocatalytic asymmetric vinylogous addition to quinones - Formation of optically active α-aryl ketones
Journal article published in 2008 by
José Alemán,
Christian Borch Jacobsen,
Kim Frisch,
Jacob Overgaard 
,
Karl Anker Jørgensen
,
Karl Anker Jørgensen
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Abstract
The first organocatalytic addition of dicyanoalkylidenes to quinones catalyzed by Cinchona alkaloids leading to formation of 1,4-diketone derivatives with high diastereomeric ratios (up to >98 : <2 dr) and enantioselectivities (up to 99% ee) has been developed; the optically active compounds obtained are useful for a number of transformations, e.g. the synthesis of optically active alpha-aryl ketones.