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Journal ArticleDOI

Thiophile Addition von Phenyllithium an Thioketene

Ernst Schaumann, +1 more
- 01 Nov 1974 - 
- Vol. 107, Iss: 11, pp 3562-3573
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.

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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

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

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†

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

Gert Köbrich
- 01 Jun 1972 - 
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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