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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 96 (1965), S. 778-783 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The preparation of cyclohexyl and hexahydrobenzyl mercaptans by means of the isothiuronium method has been investigated. Gas chromatographic analysis played an essential role.
    Notes: Zusammenfassung Die Gewinnung von Cyclohexyl- und Hexahydrobenzyl-mercaptan nach der Isothiuroniummethode wird untersucht. Die gaschromatographische Analysentechnik hat hierbei wesentliche Dienste geleistet.
    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 336 (1994), S. 613-616 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Symmetric Liquid Crystalline Bibenzyl-4,4′-diylbisbenzoates, Syntheses and Characterisation
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Liquid Crystalline Asymmetric Bisphenyl-4,4′-bibenzyldicarboxylates and Polysiloxanes with Bisphenyl-4,4′-bibenzyldicarboxylat Components in the Side Chains, Synthesis and Characterisation [1, 2]Asymmetric bisphenyl bibenzyl-4,4′-dicarboxylates with an alkenyloxy- or the 10-undecenoylgroup in the p-position of one terminal benzene ring and the butyl-, an alkoxy- or the thiomethylgroup in the p-position of the other terminal benzene ring (12-14) are synthesized. The olefins 12-14 are added to a poly(methylhydrogensiloxane) 15 to give mesomorphic side chain polysiloxanes 16-18.Data of liquid crystalline properties of 12-14, 16-18 and precursors are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 1598-1607 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sulfur Compounds in Crude Oil, III. - Dihydrodiindeno[b,d]thiophenesSyntheses to the dihydrodiindeno[b,d]thiophenes 1-3 have been studied. 1-3 were prepared by thermolysis of 8H-indeno[1,2-d]-1,2,3-thiadiazole (10) or 4H-indeno[2,1-d]-1,2,3-thiadiazole (13) or by reduction of the corresponding diketones 17, 19, and 21 which were obtained by thermolysis of indeno[1,2-d]-1,2,3-thiadiazol-8-one (16) or from 2,3-dichloroinden-1-one (23) with Na2S. Mechanisms with analogous intermediates explain the formation of the indenothiphenes. - Another synthesis of diindeno[1,2-b:2′,1′-d]thiophene-10,11-dione (21) starts from 2,5-diphenyl-3,4-thiophenedicarboxylic acid (29). - 10,11-Dihydrodiindeno[1,2-b:2′,1′-d]thiophene (3) is the known sulfurization product of hydrindene, the structure of 3 is corrected.
    Notes: Synthesen zu den Dihydrodiindeno[b,d]thiophenen 1-3 wurden untersucht. 1-3 entstehen bei der Thermolyse des 8H-Indeno[1,2-d]1,2,3-thiadiazols (10) oder 4H-Indeno[2,1-d]1,2,3-thiadiazols (13) oder durch Reduktion der zugehörigen Diketoverbindungen 17, 19 und 21, die zugänglich sind durch Thermolyse des Indeno[1,2-d]-1,2,3-thiadiazol-8-ons (16) oder aus 2,3-Dichlorinden-1-on (23) mit Na2S. Mechanismen mit analogen Intermediaten erklären die Bildung der Indenothiophene. - Eine weitere Synthese des Diindeno[1,2-b:2′,1′-d]thiophen-10,11-dions (21) geht von der 2,5-Diphenyl-3,4-thiophendicarbonsäure (29) aus. - 10,11-Dihydrodiindeno-[1,2-b:2′,1′-d]thiophen (3) ist das bekannte Schwefelungsprodukt des Indans; die Struktur von 3 wird richtiggestellt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocycles from α-Nitroolefins, IX1). - N-Substituted 3-Pyrrolecarboxylates from 4,5-Dihydro-5-(methyleneamino)-3-furancarboxylatesCatalytic hydrogenation of 4,5-dihydro-5-(methyleneamino)-3-furancarboxylates 1 yields N-substituted pyrroles 6a-u with enolizable rests at nitrogen and 6v  -  y with non-enolizable rests at nitrogen. The N-substituted pyrroles 6, 7 react with sodium hypochlorite at the rests standing at nitrogen to yield chlorination products 8. O-Methylated products 9 have been prepared from several N-substituted pyrroles 6 and their enoles 7 with diazomethane; the N-substituted pyrrole 6x yields the C-methylated product 10x.
    Notes: Katalytische Hydrierung überführt 4,5-Dihydro-5-(methylenamino)-3-furancarbonsäureester 1 in N-substituierte Pyrrole 6a-u mit enolisierbaren und 6v-y mit nichtenolisierbaren Resten am Stickstoff. Die N-substituierten Pyrrole 6, 7 reagieren mit Natriumhypochlorit an den am Stickstoff stehenden Resten zu Chlorierungsprodukten 8. Aus mehreren N-substituierten Pyrrolen 6 bzw. den zugehörigen Enolen 7 werden mit Diazomethan die O-Methylierungsprodukte 9 dargestellt; das N-substituierte Pyrrol 6x liefert das C-Methylierungsprodukt 10x.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 223-227 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Nef Reaction, VI.  -  4,5-Dihydro-5-(methyleneamino)-3-furancarboxylatesNitronic acids of the adducts of α-nitroolefines and acetoacetates react with compounds with CH-acidic methylene groups to yield 4,5-dihydro-5-(methyleneamino)-3-furancarboxylates 8. Structure 8b is proved by 13C NMR investigations. Facts supporting the mechanism are reported.
    Notes: Nitronsäuren der Addukte aus α-Nitroolefinen und Acetessigestern reagieren mit CH-aciden Methylengruppen zu 4,5-Dihydro-5-(methylenamino)-3-furancarbonsäureestern 8. 13C-NMR-Untersuchungen beweisen Struktur 8b. Befunde zum Mechanismus werden mitgeteilt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 689-700 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dithiacyclopentenes, XXXIII. - Reactions of 1,3-Dithiole-2-thiones with N-Chloramides4-Phenyl-1,3-dithiole-2-thione (1a) and 2-thioxo-1,3-dithiole-4,5-dicarbonitrile (1c) react with N,N-dichloroamides - N,N-dichlorobenzenesulfonamides 2-4, N,N-dichlorosulfamides 5, 6, N,N-dichloroethylurethane (7), N,N-dichloro-o-nitrobenzamide (8) - to give N-(1,3-dithiol)-2-ylidene)amides 17-23.
    Notes: 4-Phenyl-1,3-dithiol-2-thion (1a) und 2-Thioxo-1,3-dithiol-4,5-dicarbonitril (1c) reagieren mit N,N-Dichloramiden - N,N-Dichlorbenzolsulfonamide 2-4, N,N-Dichlorsulfamide 5,6, N,N-Dichlorethylurethan (7), N,N-Dichlor-o-nitrobenzamid (8) - zu den N-(1,3-Dithiol,2-yliden)-amiden 17-23.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocycles from α-Nitroolefins, VII. - 4,5-Dihydro-2-Methyl-5-methyleneamino-3-furancarboxylates from α-Nitroolefins, Acetoacetates, and Compounds with an Active methylene Group4,5-Dihydro-2-methyl-5-methyleneamino-3-furancarboxylates 5 are prepared by three preparative methods from α-nitroolefins 1, acetoacetates 2, and compounds with an active methylene group 4. - For 1H NMR investigations which prove the homoallylic system of the 4,5-dihydro-2-methyl-3-furancarboxylates 5 the two 4,5-dihydro-2-methyl-5-methyleneamino-4-([D5]phenyl)-[4-D]-3-furancarboxylates [D6]5e and [D6]5f have been synthesized.
    Notes: 4,5-Dihydro-2-methyl-5-methylenamino-3-furancarbonsäureester 5 werden nach drei präparativen Verfahren aus α-Nitroolefinen 1, Acetessigestern 2 und Verbindungen mit aktiver Methylengruppe 4 hergestellt. - Für 1H-NMR-Untersuchungen, die das Homoallylsystem der 4,5-Dihydro-2-methyl-3-furancarbonsäureester 5 beweisen, werden die zwei 4,5-Dihydro-2-methyl-5-methylenamino-4-[D5]phenyl)[4-D]-3-furancarbonsäureester [D66]5e und [D6]5f synthetisiert.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 622 (1959), S. 60-73 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Untersuchungen mit 36Cl zeigen, daβ die Chlorierung des Dimethylsulfids bis zum asymm. Tetrachlor-dimethylsulfid Über Addukte aus dem Chlorierungsmittel und den Thioäthern verläuft. Alle Cl-Atome sind in den Addukten energetisch gleichwertig. Die bei der Weiterchlorierung des asymm. Tetrachlor-dimethylsulfids auftretende Chlorolyse setzt nicht nur beim Pentachlor-dimethylsulfid, sondern auch schon beim asymm. Tetrachlor-dimethylsulfid selbst ein.
    Additional Material: 11 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
    Notes: Bei der Halogenierung von 5-Phenyl-1.2-dithia-cyclopentenon-(3) (I) treten Substitution (zu IV bzw. V) und Halogenolyse (zu VII bzw. VIII) ein. Die Substitution ist bei der Bromierung stärker bevorzugt als bei der Chlorierung. Der Reaktionsmechanismus wird diskutiert. Die letztlich zu 1.2-Dichlor-inden-(1)-on-(3) (XII) führende Umsetzung von cis- und trans-α.β-Dichlor-zimtsäure (IXa bzw. b) mit SOCl2 wird untersucht. I ist außer aus Zimtsäureäthylester auch aus Zimtsäurechlorid mit Schwefel zugänglich.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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