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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 889-893 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Preparation of Benzo[c]thiophenes Using a Modified Hinsberg-ReactionWhereas the tetrahydrobenzo[c]thiophenes 3 and 6 are easily obtained from 1 and 2 or 4 their dehydrogenation (i. e. aromatization) is difficult and the yields are low. However, the method allows to prepare hitherto unknown benzo[c]thiophenes with special substituents in the 1,3-positions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 340 (1998), S. 430-436 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The cathodic reduction of dibenzofuran (2), 2-chlorodibenzofuran (4), and 3-chlorodibenzofuran (1) in deuterated methanol is investigated. The Birch-type reduction product 1,4-dibenzofuran (3) is formed from 1 via 2, whereas 2-chloro-1,4-dihydrodibenzofuran (5) is obtained as by-product besides 3 from 4 as starting compound. Deuterium is only incorporated into the reduction products if CH3OD or CD3OD but not if CD3OH are used. This observation is strongly indicative of a polar mechanism involving protonation rather than a radical mechanism with hydrogen atom abstraction to be operative.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1733-1737 
    ISSN: 0009-2940
    Keywords: Dithiolactones ; Electroreduction ; Haloalkanedithioates ; Thioacetals, semicyclic ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Intramolecular cyclization occurs on electroreduction of the methyl -haloalkanedithioates 1 in methanol. The expected semicyclic thioacetals 2 are formed according to an ECEH mechanism. The biheterocycles 12 result from dimerization of intermediate radicals whereas the semicyclic ketene dithio-acetals 13 are formed by non-electrochemical processes. The 2-(methylthio)thiolanes 2 a and 16 are obtained with much higher yields and better selectivity by co-electroreduction of the -dithio-lactones 15 in the presence of dimethyl sulfate.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 66 (1983), S. 801-808 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The He(Iα) photoelectron (PE.) spectra of a series of substituted 1,2-dithietes have been recorded and assigned with respect to the orbital sequence derived from an STO-3G model calculation and by correlation with the PE. spectra of related compounds. The results provide additional support for the presence of a closed, four-membered ring moiety in all the 1,2-dithietes investigated. In all cases the two highest occupied molecular orbitals are b2(π)= HOMO, a2(π), with exception of 3,4-bis(trifluoromethyl)-1,2-dithiete where the sequence b2(π), a2(π) or a2(π), b2(π) is uncertain.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 127-141 
    ISSN: 0009-2940
    Keywords: Dithiopivaloates, S-aryl, S-benzyl ; Electroreduction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Electroreduction of Organic Compounds, 19.  -  Formation of Benzoanellated Sulfur Heterocycles by Intramolecular Cathodic Cyclization of Dithiocarboxylic EstersCathodic reduction of aryl (3) and benzyl (5) dithiopivaloates and related dithioesters with leaving groups at the benzene ring or a side chain yield the sulfur heterocycles 23, 30 - 32, and 34 depending on the nature of the starting material and the reaction conditions. In case of the α-oxo-dithioester 22, thioindigo (44) is formed.  -  The corresponding thioamides 14, 16, and 18 show a strong tendency to reductive dehalogenation but the S,N-heterocycles 38 and 39 are also formed in minor amounts.  -  The formation of the rearranged products 29 - 32, and 34 is discussed in terms of C,S-splitting in the primarily formed radical anion and subsequent C,C-coupling of the fragments and follow-up reactions.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im Gegensatz zu offenkettigen Thioamiden lassen sich Thioamid-S-oxyde mit Diazomethan methylieren. Die Methylierung erfolgt am Stickstoff der Thioamidgruppe. Aus Thiobenzanilid- und Thiobenz-p-toluidid-S-oxyd konnten kristalline Methylierungsprodukte erhalten werden. In den anderen Fällen wurden die Methylierungsprodukte durch Papier- und Dünnschichtchromatographie identifiziert. Der Methylierungsverlauf wird unter Berücksichtigung einer beim N-Methyl-thiobenzamid-S-oxyd auftretenden Besonderheit diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thiolimidester 1 werden durch Perbenzoesäure zu Amiden oxydiert. Pyridinthione-(2), Pyridinthion-(4) und Purinthione-(6) ergeben mit Wasserstoffperoxid S-Oxide, die aber leicht zu Disulfiden (z. B. 20, 24, 31) sowie in basischem Milieu zu Sulfonsäuren (z. B. 21, 25, 29) weiterreagieren. Das 6-Thio-theophyllin-S-oxid (38) wurde rein isoliert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Structure of Thioamides and Their Derivatives, XXXII1). - Synthesis, IR- and IH-NMR-spectroscopic Studies on 2-Aminobenzamides and -thiobenzamidesDifferent methods for the synthesis of amides and thioamides of 2-aminobenzoic acid, in particular those in which the protons on both amino-groups are successively exchanged by organic substituents in all possible variations, are reported. From the frequencies and the relative intensities of the NH-stretching vibration bands of these substances in tetrachloro-methane solutions and from the 1H-NMR signal assignments conclusions are drawn regarding the electronic, steric and conformational properties. especially the formation of intramolecular hydrogen bonds of the type NH…X (X = 0, S) and NH…N, as well as the occurrence of E/Z isomerism.
    Notes: Es werden Methoden zur Darstellung von Amiden und Thioamiden der 2-Aminobenzoesäure, und zwar aller durch sukzessiven Austausch der Protonen an beiden Aminogruppen gegen organische Reste denkbaren Varianten, angegeben. Aus der Lage und den relativen Intensitaten der NH-Valenzschwingungsbanden dieser Verbindungen in verdünnten Tetrachlorkohlenstofflösungen und der Zuordnung der 1H-NMR-Signale werden Aussagen über elektronische, sterische und konformative Verhältnisse, insbesondere über die Ausbildung intramolekularer NH … X- (X = 0, S) und NH … N-Wasserstoffbrücken sowie über die E/Z-Isomerie gewonnen.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 716 (1968), S. 209-211 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N-substituierte Thioamide lassen sich in einer Stufe aus Aminen, Acylierungsmitteln und Phosphorpentasulfid darstellen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: EPR-Studies in the Thioamide Series, II1). N.N-Dialkyl-thiobenzamide Radical AnionsIt is shown by the EPR-spectroscopic coupling constants, having been unequivocally assigned by the aid of specifically deuterated derivatives, that N.N-Dialkyl-thiobenzamide radical anions exhibit a twisted conformation, the aromatic nucleus and the thiocarbamoyl group being rotated out of plane. - The spin density is shown to be predominantly located in the aryl residue.
    Notes: N.N-Dialkyl-thiobenzamid-Radikal-Ionen weisen eine Konformation auf, in der die Ebenen der Aryl- und Thiocarbamoyl-Gruppen gegeneinander verdreht sind. Dies zeigen die unter Zuhilfenahme spezifisch deuterierter Derivate zugeordneten EPR-Kopplungskonstanten. -Die Spin-Dichte ist dabei vorwiegend im Aryl-Rest lokalisiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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