Journal ArticleDOI
Thiophile Addition von Phenyllithium an Thioketene
Ernst Schaumann,Wolfgang Walter +1 more
TLDR
In this article, at room temperature α-elimination occurs in the carbenoids 2b-d with formation of the alkyliden carbenes 15b−d, which react further to yield the butatrienes 13b−D, the alkenes 14b-D, and in the case of 15d to give the CH-insertion product 16.Abstract:
Bei −78°C reagieren die Dialkylthioketene 1a–d mit Phenyl- und Methyllithium unter thiophiler Addition zu den Thioathern 3a–d und 4. Die carbenoide Zwischenstufe konnte fur 2c mit Kohlendioxid und mit Methyljodid zu 7 und 8 abgefangen werden. Bei Raumtemperatur gehen die Carbenoide 2b–d α-Eliminierung zu den Alkylidencarbenen 15b–d ein, die zu den Butatrienen 13b–d, den Alkenen 14b–d und fur 15d zum CH-Insertionsprodukt 16 weiterreagieren.
Thiophilic Addition of Phenyllithium to Thioketenes
At −78°C the dialkylthioketenes 1a–d react with phenyl-and methyllithium in thiophilic additions to give the thioethers 3a–d and 4. The carbenoid intermediate 2c could be trapped with carbon dioxide or methyl iodide to 7 and 8. At room temperature α-elimination occurs in the carbenoids 2b–d with formation of the alkylidencarbenes 15b–d, which react further to yield the butatrienes 13b–d, the alkenes 14b–d, and in the case of 15d to give the CH-insertion product 16.read more
Citations
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Journal ArticleDOI
Erzeugung und Reaktionen von α‐(Trimethylsilyl)‐, α‐(Phenylthio)‐und α‐(Phenylseleno)vinyllithium‐Verbindungen
TL;DR: In this paper, the generation and reactions of α-(Trimethylsilyl)-, α-(Phenylthio)-, and α-(phenylseleno)vinyllithium derivatives are reported.
Journal ArticleDOI
Blitzthermolyse organischer Verbindungen, 4. Thioketene aus 1,2,3‐Thiadiazolen und 1,3‐Dithietanderivaten
Günther Seybold,Christian Heibl +1 more
TL;DR: In this article, a general synthesis of thioketenes via flash-thermolysis of 1,2,3-thiadiazoles 1 and 1, 3-dithietan derivatives 2 and 3 is described.
References
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Journal ArticleDOI
Nucleophile Acylierung mit 2-Lithium-1,3-dithianen bzw. -1,3,5-trithianen1,2,3
Journal ArticleDOI
Methods and Possibilities of Nucleophilic Acylation
TL;DR: Nucleophilic acylation is the attachment of an
group to an electrophilic center as mentioned in this paper, where the group is formed by a mixture of metalated vinyl ether derivatives or carbanions derived from acetals.
Journal ArticleDOI
Chemistry of Stable α-Halogenoorganolithium Compounds and the Mechanism of Carbenoid Reactions†
Gert Köbrich,Ali Akhtar,F. Ansari,W. E. Breckoff,H. Büttner,W. Drischel,Rolf Fischer,Klaus Flory,H. Fröhlich,W. Goyert,H. Heinemann,I. Hornke,H. R. Merkle,H. Trapp,W. Zündorf +14 more
TL;DR: A review of the methods for their preparation and of their reactivity can be found in this article, where a mechanism is proposed which fits the experimental data for various carbenoid reactions, which can be used singly or combained for the synthesis of substances of very different types.
Journal ArticleDOI
The Chemistry of Carbenoids and Other Thermolabile Organolithium Compounds
TL;DR: The use of organometallic compounds as short-lived intermediates has been studied in the literature as discussed by the authors, where they have been used as intermediates of important reactions, and have been found to be thermally quite stable.
Journal ArticleDOI
Chemie stabiler Lithium‐α‐halogenorganyle und Mechanismus carbenoider Reaktionen
TL;DR: In this article, a mechanistische interpretation of Reaktionen erlaubt eine einheitliche mechanistischen interpretation of Carbenoide.
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Thiophilic additions of organometallics to thiobenzophenones and of phenyllithium to phenyl dithiobenzoate and phenyl trithiocarbonate
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