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  • 1
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Sulfur Diimides, IV1). - Dehydrogenations by N,N′-Bis(p-toluenesulfonyl)- sulfur DiimideN,N′-Bis(p-toluenesulfonyl)sulfur diimide (1) dehydrogenates hydrazo compounds to azo compounds, hydroquinones and pyrocatechol to quinones, thiols to disulfides and dihydronaphthalenes to naphthalenes, in most cases under mild conditions. The reaction of 1 with benzyl alcohols and oximes resembles an SNi- or SNi′-process.
    Notes: N,N-Bis(p-toluolsulfonyl)schwefeldiimid (1) dehydriert, meist unter milden Bedingungen, Hydrazoverbindungen zu Azoverbindungen, Hydrochinon und Brenzcatechin zu Chinonen, Thiole zu Disulfiden sowie Dihydronaphthaline zu Naphthalinen. Die Umsetzung von 1 mit Benzylalkoholen und Oximen erfolgt nach Art einer SNi- oder SNi′-Reaktion.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,6-Cyclization of Phenyliminomethylimino Cumulenes: Formation of Quinazoline DerivativesThe reaction of N2-arylamidines 1 with N-tosylisocyanodichloride gives the quinazoline derivatives 5. Addition of the compounds 1 to chloral followed by treatment with acetic anhydride yields the quinazolines 9, 10 and 13.
    Notes: Die Reaktion von N2-Arylamidinen 1 mit N-Tosylisocyandichlorid 4 führt zu den Chinazolinderivaten 5. Bei der Umsetzung der Verbindungen 1 mit Chloral und nachfolgender Behandlung mit Acetanhydrid werden die Chinazoline 9, 10 und 13 erhalten.
    Additional Material: 1 Tab.
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  • 3
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Sulfur Diimides V - Reaction of N,N′-Ditosylsulfur Diimide with Nucleophilic and Electrophilic ReagentsN,N′-Ditosylsulfur diimide (1) reacts smoothly with organic sulfides as nucleophilic reagents. The structure of the products and the mechanism of their formation are discussed. If the SN bond in 1 possessed ylid character, a reactivity towards electrophilic reagents could be foreseen. This is not observed.
    Notes: N,N′-Ditosylschwefeldiimid (1) reagiert infolge der starken Positivierung des S-Atoms glatt mit Sulfiden als nucleophilen Reaktionspartnern. Die Struktur der Produkte und der Verlauf der Umsetzung werden diskutiert. Eine bei Ylidcharakter der SN-Bindung in 1 zu erwartende Reaktivität gegenüber elektrophilen Reagentien konnte nicht nachgewiesen werden.
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  • 4
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Sulfur Diimides, VI.- Ene Reactions and [2 + 2]-Cycloadditions of N,N′-Ditosyl Sulfur Diimide and N-Sulfinyl-p-toluenesulfonamidePropene derivatives react with N,N′-ditosyl sulfur diimide (1) with formation of allylsulfin- amidines, which rearrange easily to N-allyl-N,N′-thiobis(sulfonamides). In the reaction of 1 with vinyl ethers, [2 + 2]-cycloaddition occurs. If there is an allylic CH-group in the vinyl ether, the initially formed adduct is transformed into N-allyl-N,N′-thiobis(sulfonamide) derivatives.
    Notes: Propenderivate reagieren mit N,N′-Ditosylschwefeldiimid (1) unter Bildung von Allylsulfinsäureamidinen, die sich leicht zu N-Allyl-N,N′-thiobis∼sulfonamiden) umlagern. Bei der Umsetzung von 1 mit Enoläthern erfolgt primär [2 + 21-Cycloaddition; falls im Enoläther allylische CH-Gruppierungen vorhanden sind, stabilisiert sich das Addukt ebenfalls zu N-Allyl- N,N′-thiobis(sulfonamid)derivaten.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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