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  • Chemistry  (91)
  • General Chemistry  (38)
  • Industrial Chemistry  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Cyclisierungen mit 1-Nitro-2-anilino-äthylenen (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 149-158 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclizations with 1-nitro-2-anilino-ethylenesThe reaction of 1-nitro-2-anilino-2-methylthio-ethylenes 1 with oxalyl chloride yields the substituted 4-nitropyrrol-2,3-diones 4, and with chlorocarbonyl-sulfenylchloride the 5-nitro-thiazolones 6. The methylthio group from 6 can be exchanged by amines. From 1-nitro-2,2-bis(anilino)ethylenes 2 - available from 1-nitro-2,2-bis(methylthio)-ethylene and anilines - and the same reagents, the substituted 2-nitromethylene-imidazolidine-4,5-diones 5 and the thiazolo[4,5-d]thiazoledione 9 result. The condensation of 1-nitro-2-anilino-2-hydrazino-ethylene 3 with derivatives of carboxylic acids yields 2-nitromethyl-s-triazole 12, with diacetyl the substituted 3-nitromethylene-as-triazine 13.
    Notes: 1-Nitro-2-anilino-2-methylmercapto-äthylen 1 reagiert mit Oxalylchlorid zu substituierten 4-Nitropyrroldionen-(2,3) 4 und mit Chlorcarbonyl-sulfenylchlorid zu substituierten 5-Nitrothiazolonen-(2) 6, deren Methylmercaptogruppe gegen Amine austauschbar ist. 1-Nitro-2,2-bis(anilino)-äthylene 2 - erhältlich aus 1-Nitro-2,2-bis(methylmercapto)-äthylen und Anilinen  -  liefert mit den gleichen Agenzien substituierte 2-Nitromethylenimidazolidindione-(4,5) 5 und das Thiazolo[4,5-d]thiazoldion 9. 1-Nitro-2-anilino-2-hydrazino-äthylen 3 wird mit Carbonsäurederivaten zu substituierten 2-Nitromethyl-s-triazolen 12, mit Diacetyl zum 3-Nitromethylen-as-triazin derivat 13 kondensiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190120
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  • 2
    Electronic Resource
    Electronic Resource
    3-Amino-5-nitromethylen-1,2-dithiol-4-carbonsäureester (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 133-136 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Methyl(3-amino-5-nitromethylene-1,2-dithiol-4)carboxylate
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230119
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  • 3
    Electronic Resource
    Electronic Resource
    Einstufige Synthese von Pyrazino[1,2-a:4,5-a′]diindol-6,13-dionen (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 745-748 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290428
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  • 4
    Electronic Resource
    Electronic Resource
    5-Arylamino-3-brom-1,2,4-thiadiazole und 5-Arylamino-3-bromisothiazole (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 355-358 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 5-Arylamino-3-bromo-1,2,4-thiadiazoles and 5-Arylamino-3-bromo-isothiazoles
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290230
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  • 5
    Electronic Resource
    Electronic Resource
    Reaktion von methylenaktiven Nitrilen und Cyanamid mit acylierten Enaminen (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 933-941 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of Methylene Active Nitriles and Cyanamide with Acylated EnaminesThe addition products from enamines onto isocyanates and isothiocyanates, i.e. substituted β-aminoacrylo amides 1 and thioamides 2, react with malononitrile to yield the 6-amino-1-aryl-5-cyano-pyridin-2-ones 3 and -thiones 4 among them 5,6,7,8-tetrahydroisoquinolin-1-ones and -thiones. From ethyl cyanoacetate the 5-cyano-6-hydroxy-pyridin-2-ones 7 and from benzoyl acetonitrile the 6-phenyl-pyridin-2-ones 8 are formed. The replacement of malononitrile by cyanamide yields the 2-amino-3-aryl-pyrimidin-4-ones 5 and -thiones 6 among them 5,6,7,8-tetrahydroquinazolin-4-ones and -thiones. The not isolated β-acyl enamines derived from enamines and acid chlorides react with malononitrile or cyanamide to form the pyridin-2-ones 14 or pyrimidin-2-ones 15 caused by Dimroth-rearrangement.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240611
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Reaktion von 1, 1-Dimethylthio- und 1-Dimethylamino-2-nitroethen mit dimerem Malononitril (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 328-332 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of 1, 1-Dimethylthio- and 1-Dimethylamino-2-nitroethene with Malononitrile Dimer
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270218
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  • 7
    Electronic Resource
    Electronic Resource
    Neue Synthese von substituierten 4-Amino-chinazolinen und deren Heteroanalogen (1996)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 338 (1996), S. 206-213 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: New Synthesis of Substituted 4-Amino-quinazolines and Their HeteroanalogaN-Chloracetyl-anthranilonitriles react with potassium thiocyanate in the presence of alcohol to the (4-aminoquinazolin-2-yl-thio)-acetic acid ester (5). In the presence of water or primary amine the acetic acid derivative (6) or the acetic acid amide derivatives (7) are obtained. 2,4-Diaminoquinazolines (8) arise if vigorous reaction conditions are employed. With 2-chloracetylamino-cyclopent-1-en-carbonitrile as starting material the pyrimidines (11) are formed from the reaction with potassium thiocyanate. Analogously, (4-pyrimidyl-2-yl-seleno)-acetic acid ester (12) and (thiazolo[4,5-d]pyrimid-2-yl-seleno)-acetic acid derivatives (16) can be prepared with potassium selenocyanate. N-Chloracetyl derivatives of 5-membered heterocycles with enamino-nitrile structure (13, 15, 18, 20) react with potassium thiocyanate to yield thieno[2,3-d]-, thiazolo[4,5-d]-, pyrrolo[2,3-d]-, furo[2,3-d]- and pyrazolo[4,3-d]pyrimidines (14, 16, 19a, 19b, 21).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19963380144
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  • 8
    Electronic Resource
    Electronic Resource
    „Radioisotopes in the physical Sciences and Industry.“ IAEA-Conference Proceedings, Copenhagen, 6.-7. Sept. 1960. Globus-Druck und Verlagsanstalt, Wien, Januar 1962. 1736. S., 3 Bed., kart., je DM 28,- (1963)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 14 (1963), S. 57-57 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19630140122
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Deckschichterzeugung auf Stahloberflächen nach dem kombinierten Oxalsäure-Chromsäure-Verfahren (1962)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 13 (1962), S. 22-29 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The formation of a top layer on steel surfaces by means of the combined oxalic acid'chromic acid methodIn the investigations here described, the attempt has been made to analyze the mechanism of the top layer formation with the combined oxalic acid/chromic acid treatment of steel plates and to interpret the particularly effective corrossion protection obtained by this method. The mechanism of the formation of the oxalate layer and its catalytic acceleration by the so-called “working-in” compound as well as the reaction of the chromic acid with the metal surface are discussed. It is shown that the corrosion protection layer is ultimately obtained by a normal passivation of the metal surface by means of the chromic acid. The specific effect of the pretreatment with oxalic acid is based not only on a direct participation in the formation of the top layer but on a particularly favourable preparation of the surface for the subsequent passivation.
    Notes: In den beschriebenen Untersuchungen wird der Versuch gemacht, den Mechanismus der Deckschichtbildung bei der kombinierten Oxalsäure-Chromsäurebehandlung won Stahlblechen zu analysieren und die nach diesem Verfahren erreichte besonders gute Korrosionsschutzwirkung zu deuten. Der Mechanismus der Oxalatschichtbildung und ihrer katalytischen Beschleunigung durch das sog. Einarbeitungssalz sowie die Reaktion der Chromsäure mit der Oxalatschicht und mit der Metalloberfläche wird erörtert. Es wird gezeigt, daß die Korrosionsschutzschicht letztlich in einer normalen Passivierung der Metalloberfläche durch die Chromsäure entsteht. Die spezifische Wirkung der Oxalsäurevorbehandlung beruht nicht auf einer direkten Beteiligung am Deckschichtenaufbau, sondern auf einer besonders günstigen Vorbereitung der Oberfläche für die anschließende Passivierung.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19620130106
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  • 10
    Electronic Resource
    Electronic Resource
    Treatise on Analytical Chemistry. Herausgeg. von I. M. Kolthoff und Phil. J. Elving, unter Mitarbeit von E. B. Sandell, Part II: Analytical Chemistry of the elements, Vol. 9, Uranium and the Trans. uranium Actinide Elements. Verl. Intersciences Publishers (J. Wiley & Sons, New York) 1962. 498 S., sh 135/- (1963)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 14 (1963), S. 154-154 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19630140217
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