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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Chemoenzymatic Functionalization Of Cyclic 1,3-diketones

Findik, Hamide 01 January 2004 (has links) (PDF)
Chiral &amp / #945 / -hydroxy and &amp / #945 / -acetoxy enones are important starting materials in the synthesis of many biologically active materials. In this work, enantiomerically pure &amp / #947 / -hydroxy enone and polyoxo cyclohexenones are synthesized starting from 1,3-cyclohexandione. In the first step, 1,3-cyclohexandione is protected under acid catalyzation and 3-methoxy-2-methyl-2-cyclohexen-1-one is obtained. &amp / #945 / &#039 / -Acetoxy enone is obtained by Mn(OAc)3 mediated oxidation which is an attractive alternative to other multi-step procedures in the literature. Enzymatic kinetic resolution is applied to the racemic form of this product and enantiomerically pure &amp / #945 / &#039 / -acetoxy enone and &amp / #945 / &#039 / -hydroxy enone is obtained. In this stage, for the screening of the reaction many enzymes were tried. Reduction of &amp / #945 / &#039 / -hydroxy enone furnished enantiopure &amp / #947 / -hydroxy enone.

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