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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 4
BKCSDE 26(4)
April 20, 2005

Title	Dynamic Kinetic Resolutions and Asymmetric Transformations by Enzyme-Metal Combo Catalysis
Author	Mahn-Joo Kim, Yangsoo Ahn, Jaiwook Park
Keywords	Catalytic racemization, Dynamic kinetic resolution, Asymmetric transformation, Enzyme-metal combo catalysis, Chirotechnology
Abstract	Enzyme-metal combo catalysis is described as a useful methodology for the synthesis of optically active compounds. The key point of the method is the use of enzyme and metal in combination as the catalysts for the complete transformation of racemic substrates to single enantiomeric products through dynamic kinetic resolution (DKR). In this approach, enzyme acts as an enantioselective resolving catalyst and metal does as a racemizing catalyst for the efficient DKR. Three kinds of enzyme-metal combinations - lipase-ruthenium, subtilisin-ruthenium, and lipase-palladium ? have been developed as the catalysts for the DKRs of racemic alcohols, esters, and amines. The scope of the combination catalysts can be extended to the asymmetric transformations of ketones, enol acetates, and ketoximes via the DKRs. In most cases studied, enzyme-metal combo catalysis provided enantiomerically-enriched products in high yields.
Page	515 - 522
Full Text	PDF

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