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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1763-1768 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions involving Hydrogen Transfer, III. Hydrogen-Transfer Between o,o′-Bridged Tetraarylethylenes and DiarylmethanesThermal hydrogen transfer between o,o′-bridged diarylmethanes and o,o′-bridged tetraarylethylenes leads to reduction of the ethylenes and to dimerization and dehydrogenation of the diarylmethanes (equ. (1)-(5)). The ethylene 1 reacts with 9,10-dihydroanthracene (15) to form 3 and anthracene (16)[equ. (6)]. The principles of these reaction are discussed.
    Notes: Bei der thermischen Wasserstoffübertragung zwischen o,o′-überbrückten Diarylmethanen und o,o′-überbrückten Tetraarylethylenen werden die eingesetzten Ethylene hydriert und die Diarylmethane dehydrierend dimerisiert (Gleichungen (1)-(5)). Das Ethylen 1 und 9, 10-Dihydroanthracen (15) liefern nach (6) 3 und Anthracen (16) Die Grundlagen dieser Reaktion werden diskutiert.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,2,3-Tricarbonyl Compounds, XIII Reaction of Ninhydrin and of 1,2,3-Indantrione with Compounds with two Functional Groups. A Contribution to the Formation of Spiro Compounds from NinhydrinNinhydrin (1) reacts with compounds 2-6 according to scheme (1) to give the 1,4-diazaspiro-[4.4]nonanes 7-11. The reaction of piperazine with 1 furnishes the hemiacetal 14. The spiro compounds 16 and 17 were obtained by the reaction of 1 with 2-bromoethanol and 3-bromopropanol, respectively. The non-catalysed reaction of 1,2-ethanedithiol with 1 or dehydrated ninhydrin (1,2,3-indantrione; 15) yields the hemimercaptal 18, whereas with 15 in the presence of boron trifluoride as catalyst the mercaptal 19 is obtained. The formation of spiro compounds from 1 is discussed.
    Notes: Ninhydrin (1) reagiert mit den N, N′-disubstituierten Ethylendiaminen 2-6 nach Schema (1) unter Bildung der 1,4-Diazaspiro[4.4]nonane 7-11. Die Umsetzung mit Piperazin führt zum Bis-halbaminal 14. Spiro[1,3-dioxolan-2,2′-indan]-1′,3′-dion (16) und Spiro[1,3-dioxan-2,2′-indan]-1′,3′-dion (17) entstehen bei der Reaktion von 1 mit 2-Bromethanol bzw, 3-Brompropanol. Die unkatalysierte Einwirkung von 1,2-Ethandithiol auf 1 oder dehydratisiertem Ninhydrin (1,2,3-Indantrion; 15) liefert das Bis-halbmercaptal 18, während mit 15 unter Bortrifluorid-Katalyse das Bis-ethylemercaptal 19 gebildet wird. Die Bildung von Spiroverbindungen aus Ninhydrin (1) wird diskutiert.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3719-3721 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions Involving Hydrogen-Transfer, II. Reactions of Tetraarylethylenes with DiarylmethanesBis(2,2′-biphenylylene)ethylene (1) reacts with fluorene (2) in the melt to form 9,9′-bifluorenyl (3), [equ. (1)]. The influence of time and temperature on this reaction has been investigated. Studies on the use of other tetra- and triarylethylenes and other diarylmethanes are described.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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