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Regio- and Stereoselective Catalytic Addition o...
92,50 € *
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The enamide moiety is an important substructure often encountered in biologically active compounds and synthetic drugs. Furthermore, enamides and their derivatives are versatile synthetic intermediates for polymerization, [4+2] cycloaddition, crosscoupling, Heck-olefinination, Halogenation, enantioselective addition or asymmetric hydrogenation. Traditional syntheses of this important substrate class involve rather harsh reaction conditions such as high temperatures and/or the use of strong bases. Based on previous work on the addition of secondary amides to alkynes, a new broadly applicable protocol for the catalytic addition of N-nucleophiles such as primary amides, imides and thioamides to terminal alkynes was developed. The choice of ligands and additives determines the regiochemical outcome so that with two complementary catalyst systems, both the E-anti-Markovnikov products and the Z-anti-Markovnikov products can be synthesized highly regio- and stereoselectively.

Anbieter: Dodax AT
Stand: 19.01.2020
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Blanchot, M: Regio- and Stereoselective Catalyt...
89,90 € *
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Erscheinungsdatum: 28.09.2015, Medium: Taschenbuch, Einband: Kartoniert / Broschiert, Titel: Regio- and Stereoselective Catalytic Addition of Amides to Alkynes, Titelzusatz: Synthesis of the enamide substructure in the most atom-economic and environmentally friendly way, Autor: Blanchot, Mathieu, Verlag: Südwestdeutscher Verlag für Hochschulschriften AG Co. KG, Sprache: Deutsch, Rubrik: Organische Chemie, Seiten: 228, Informationen: Paperback, Gewicht: 356 gr, Verkäufer: averdo

Anbieter: averdo
Stand: 19.01.2020
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The Enzymes in Synthesis of Chiral Bioactive Co...
59,90 € *
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The administration of chiral compounds in an enantiomerically pure form, instead of racemic mixtures, become an important issue especially in the pharmaceutical and agrochemical industries due to the well established correlation between the biological activity and stereochemistry. Pure enantiomers could be formed by the asymmetric synthesis and /or the resolution of racemates. This could be achieved by the use of enzymes as chiral catalysts. The advantages of enzymes are their high stereo- (chiral), regio- (positional) and chemo- (functional group specific) selectivity. This selectivity offers several benefits like high catalytic efficiency, preservation of asymmetric centres, single step transformations, easier separation, mild operating conditions and fewer environmental problems. The organic reactions that are catalyzed by enzymes to give chiral bioactive organic compounds include, for example, reduction (e.g. by dehydrogenases, ketoreductases), oxidation (e.g. by monooxygenases, dioxygenases), hydrolytic (e.g. by lipases, esterases) reactions.

Anbieter: Dodax
Stand: 19.01.2020
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The Enzymes in Synthesis of Chiral Bioactive Co...
61,60 € *
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The administration of chiral compounds in an enantiomerically pure form, instead of racemic mixtures, become an important issue especially in the pharmaceutical and agrochemical industries due to the well established correlation between the biological activity and stereochemistry. Pure enantiomers could be formed by the asymmetric synthesis and /or the resolution of racemates. This could be achieved by the use of enzymes as chiral catalysts. The advantages of enzymes are their high stereo- (chiral), regio- (positional) and chemo- (functional group specific) selectivity. This selectivity offers several benefits like high catalytic efficiency, preservation of asymmetric centres, single step transformations, easier separation, mild operating conditions and fewer environmental problems. The organic reactions that are catalyzed by enzymes to give chiral bioactive organic compounds include, for example, reduction (e.g. by dehydrogenases, ketoreductases), oxidation (e.g. by monooxygenases, dioxygenases), hydrolytic (e.g. by lipases, esterases) reactions.

Anbieter: Dodax AT
Stand: 19.01.2020
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Metagenomic Lipase
49,00 € *
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Enzyme plays an important role in many biological and industrial processes. As a result, several chemical industries are employing biocatalysts for its promising applications in molecular, regio and enantio-selectivity and ultimately economy. The organic reactions performed by the enzymes are enormous and being the first rate-limiting step in the iterative cycle of setting up bio catalytic process. Present, book discusses cloning and characterization of metagenomic lipase. In general, the lipolytic enzymes are produced by variety of organisms. Lipases obtained from microorganisms are industrially more important, as they are more stable towards harsh processes. The gene encoding lipase was amplified with degenerate set of primers and cloned. The cloned product was expressed, purified and characterized biophysically and biochemically. Furthermore, the book discuses the use of directed evolution of the lipase employing error prone PCR/site directed mutagenesis. A mutant developed by directed evolution is discussed and characterized biophysically/biochemically, the results were compared with the wild type protein.

Anbieter: Dodax
Stand: 19.01.2020
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Metagenomic Lipase
50,40 € *
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Enzyme plays an important role in many biological and industrial processes. As a result, several chemical industries are employing biocatalysts for its promising applications in molecular, regio and enantio-selectivity and ultimately economy. The organic reactions performed by the enzymes are enormous and being the first rate-limiting step in the iterative cycle of setting up bio catalytic process. Present, book discusses cloning and characterization of metagenomic lipase. In general, the lipolytic enzymes are produced by variety of organisms. Lipases obtained from microorganisms are industrially more important, as they are more stable towards harsh processes. The gene encoding lipase was amplified with degenerate set of primers and cloned. The cloned product was expressed, purified and characterized biophysically and biochemically. Furthermore, the book discuses the use of directed evolution of the lipase employing error prone PCR/site directed mutagenesis. A mutant developed by directed evolution is discussed and characterized biophysically/biochemically, the results were compared with the wild type protein.

Anbieter: Dodax AT
Stand: 19.01.2020
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Regio- and Stereoselective Catalytic Addition o...
89,90 € *
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Regio- and Stereoselective Catalytic Addition of Amides to Alkynes ab 89.9 € als Taschenbuch: Synthesis of the enamide substructure in the most atom-economic and environmentally friendly way. Aus dem Bereich: Bücher, Wissenschaft, Chemie,

Anbieter: hugendubel
Stand: 19.01.2020
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Regio- and Stereoselective Catalytic Addition o...
89,90 € *
ggf. zzgl. Versand

Regio- and Stereoselective Catalytic Addition of Amides to Alkynes ab 89.9 EURO Synthesis of the enamide substructure in the most atom-economic and environmentally friendly way

Anbieter: ebook.de
Stand: 19.01.2020
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