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http://dx.doi.org/10.18419/opus-1142
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DC Element | Wert | Sprache |
---|---|---|
dc.contributor.author | Effenberger, Franz | de |
dc.contributor.author | Roos, Michael | de |
dc.contributor.author | Ahmad, Roshan | de |
dc.contributor.author | Krebs, Andreas | de |
dc.date.accessioned | 2009-08-27 | de |
dc.date.accessioned | 2016-03-31T07:47:44Z | - |
dc.date.available | 2009-08-27 | de |
dc.date.available | 2016-03-31T07:47:44Z | - |
dc.date.issued | 1991 | de |
dc.identifier.other | 316177032 | de |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-43946 | de |
dc.identifier.uri | http://elib.uni-stuttgart.de/handle/11682/1159 | - |
dc.identifier.uri | http://dx.doi.org/10.18419/opus-1142 | - |
dc.description.abstract | The preparation of the 1-methyl(trimethylsilyl) (TMS)-substituted imidazoles 3a, 4a, 8, 9, and 11a by silylation of the corresponding metallated imidazoles is described. Carbodesilylation of 3 with aldehydes or carboxylic halogenides occurs selectively in 2-position. In the presence of a strong base (CsF) the reactivity against carbon electrophiles correlates well with the stability of the imidazolyl anions; regioselective carbodesilylation in 2-, 5-, or 4-position of the twofold TMS-substituted imidazoles 3a and 9 therefore is possible, which allows the synthesis of a great variety of hydroxyalkyl-substituted imidazoles and of acylimidazoles. By using the dimethylsulfamoyl substituent as an N-protecting group, the N- unsubstituted 5-benzoylimidazole (26) as well as the comparable 5-benzoyl-pyrazole (30b) and 5-(hydroxyphenylmethyl)-pyrazole (30a) are accessible. | en |
dc.language.iso | de | de |
dc.rights | info:eu-repo/semantics/openAccess | de |
dc.subject.classification | Imidazol , Pyrazole | de |
dc.subject.ddc | 540 | de |
dc.title | Carbodesilylierung von (Trimethylsilyl)imidazolen und -pyrazolen | de |
dc.title.alternative | Carbodesilylation of (trimethylsilyl)imidazoles and -pyrazoles | en |
dc.type | article | de |
dc.date.updated | 2010-01-19 | de |
ubs.fakultaet | Fakultät Chemie | de |
ubs.institut | Institut für Organische Chemie | de |
ubs.opusid | 4394 | de |
ubs.publikation.source | Chemische Berichte 124 (1991), S. 1639-1650. URL http://dx.doi.org./10.1002/cber.19911240727 | de |
ubs.publikation.typ | Zeitschriftenartikel | de |
Enthalten in den Sammlungen: | 03 Fakultät Chemie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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eff213.pdf | 1,3 MB | Adobe PDF | Öffnen/Anzeigen |
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