Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Ringöffnungsreaktion"”.
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Heterogeneously catalyzed reactions with vegetable oils : epoxidation and nucleophilic epoxide ring-opening with alcohols
Chemical modification of vegetable oils, via epoxidation and epoxide ring-opening with alcohols was studied, using environmentally acceptable methods. Epoxidation of vegetable oils with peracids produced in the presence of heterogeneous acidic catalysts requires low contact between the epoxide and …
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Asymmetric anhydride opening : optimization and applications
This PhD thesis describes the desymmetrization of easily accessible meso-anhydrides by cinchona alkaloid-mediated opening with benzyl alcohol. This procedure was found to be applicable to a variety of structurally different substrates and leads to the corresponding optically active hemiesters with …
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Asymmetric synthesis of sultones and sulfonic acid derivatives
A highly efficient diastereo- and enantioselective route to alpha, gamma-substituted gamma-sultones via alpha-allylation of lithiated sulfonates bearing 1,2:5,6-di-O-isopropylidene-alpha-D-allofuranose as a chiral auxiliary has been developed. High asymmetric inductions of the alpha-allylations …
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Enantioselective ring opening reactions catalysed by heterogenized metal salen complexes
Epoxides are important intermediates for the stereo controlled synthesis of complex organic enantioselective compounds. Their use has increased dramatically with the advent of practical asymmetric catalytic methods for their synthesis. In the early nineties, Jacobsen et al. designed the chiral …