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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 661-668 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Isocyanates react as N-nucleophiles with α-chlorobenzylic cations (2) to give 1-oxoisoindolium salts (5). From the reaction of benzotrichlorides with SbCl5 and isocyanates the extremely reactive hexachloroantimonates 5 with R2 = Cl are isolated. Hydrolysis of these cyclic N-acyl iminium salts affords phthalimides 6. Reaction of 5 k with dimethylcyanamide gives the 2-azoniaallene salt 13. p-Tolyl isocyanate is Friedel-Crafts alkylated by p-chlorobenzotrichloride (1i) in the presence of SbCl5 to furnish the 1,3-oxadiazinium salt 7, which is hydrolyzed to give the benzophenone 9. With ethanol the acetals 10 and 11 are formed from 7.
    Additional Material: 1 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 337 (1995), S. 274-282 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,3-Dichloro-2-azoniaallene hexachloroantimonates (1) reacted with H2S to give 1,2,4-dithiazolium salts 2. With hydrazines 1,2,4-triazolium salts (3, 4) were formed. 1,3-Dimethylurea, respectively 1,3-dimethylthiourea or ethyl allophanate, reacted with 1 to afford 2-oxo- or 2-thioxo-1,3,5-triazinium salts (5-7). With diphenylmethaneimines imino substituted 2-azoniaallene salts 8 were produced. From chloroacetonitrile dichloropyrimidines 9, and from the tricyanomethyl anion a hexatriene 10 and a triazine 11 could be prepared. The 1,5-dichloro substituted 2-azoniaallene salts 12 reacted as bifunctional electrophiles with nucleophiles such as benzophenone hydrazone or anilines, to furnish 1,3,5-triazinium salts 14. Against benzohydrazide the allene 12j behaved as trivalent electrophile giving the bicyclic 1,3,5-oxadiazinium salt 13j, the constitution of which has been secured by a crystal structural analysis. The vinyl-2-azoniaallene salt 1i cyclized on heating to the 1,3-thiazinium salts 16, 17. From 17 the triazinium salts 18 were prepared with alcohols.
    Additional Material: 2 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 481-482 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Propane-1,3-sultone (1) reacts with phenylhydrazine as well as with acid hydrazides yielding the corresponding sulphonic acids 2a-f in good yields. On reaction of 2,4-dimethyl-1,3-butadiene-1,4-sultone (3) with hydrazides by fusion or in a nonpolar solvent, the sultams 4a-f are obtained, and in alcohols the corresponding sulphonic acids 5a-d or the hydrazine derivative 6 are obtained.
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  • 4
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mono-, Bis- and Trishydrazo, and -azo Compounds in the Tricyanobenzene Series, I. - Synthesis and Properties of the Title CompoundsIn 2-bromo-1,3,5-benzenetricarbonitrile (3) and chlorobenzenepentacarbonitrile (4) the halogen atoms can easily be substituted for phenylhydrazine. Also in 2,4,6-trichloro-1,3,5-benzenetri-carbonitrile (1) and 2,4,6-trifluoro-1,3,5-benzenetricarbonitrile (2) one or two halogen atoms can easily be replaced with phenylhydrazine forming the monohydrazo compounds 5a, b and the bishydrazo compounds 6a, b. The substitution of all three halogen atoms by phenylhydrazine is only possible under drastic conditions (pressure) using the fluorine compound 2. In 6a the remaining fluorine atom can also be replaced with phenolate ions, alkyl-(aryl-)thiolate ions or amines. Oxidation of the hydrazo derivatives 5a - d, 6a - f, and 7 with lead dioxide gives the azo compounds 8a - d, 9a - f, and 10. The chemical and spectroscopical properties of the hydrazo and azo compounds are described.
    Notes: Die Halogenatome in 2-Brom-1,3,5-benzoltricarbonitril (3) und Chlorbenzolpentacarbonitril (4) lassen sich glatt durch Phenylhydrazin substituieren. Auch in 2,4,6-Trichlor-1,3,5-benzoltricarbonitril (1) und 2,4,6-Trifluor-1,3,5-benzoltricarbonitril (2) können ein oder zwei Halogenatome leicht durch Phenylhydrazin substituiert werden, wobei die Monohydrazoverbindungen 5a, b sowie die Bishydrazoverbindungen 6a, b gebildet werden. Die Substitution aller drei Halogenatome durch Phenylhydrazin ist nur im Fall der Fluorverbindung 2 möglich und auch dann nur unter drastischen Bedingungen (Druck). In 6a kann das verbleibende Fluoratom auch durch Phenolat-Ionen, Alkyl-(Aryl-)thiolat-Ionen oder durch Amine nucleophil substituiert werden. Die Oxidation der Hydrazoderivate 5a - d, 6a - f und 7 mit Bleidioxid ergibt die entsprechenden Azoverbindungen 8a - d, 9a - f und 10. Die chemischen und spektroskopischen Eigenschaften der Hydrazo- und Azoverbindungen werden beschrieben.
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 732 (1970), S. 107-111 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Phosphorus Compounds, II. Conversion of 2-Chloro-4.6-bis-halogenophenoxy-s-triazines to 2-Phosphonate Esters and 2-AminesSubstituted 2-chloro-4.6-bis-phenoxy-s-triazines 1 are prepared from halogenophenols and cyanuric chloride catalyzed by tertiary amines or amides. They react with trialkylphosphites giving the corresponding 2-phosphonate esters 2. Reaction with amines leads to the 2-amino derivatives 3 and 4. The solubility of compounds of the types 1-3 in organic solvents is compared (table 1).
    Notes: Substituierte 2-Chlor-4.6-bis-phenoxy-s-triazine 1 lassen sich aus halogenierten Phenolen und Cyanurchlorid unter Katalyse durch tertiäre Amine bzw. Säureamide gewinnen. Sie reagieren mit Trialkylphosphiten zu den entsprechenden 2-Phosphonsäureestern 2, mit Aminen zu den 2-Amino-Derivaten 3 und 4. Die Löslichkeit von Vertretern der Typen 1-3 in organischen Lösungsmitteln wird verglichen (Tab. 1).
    Additional Material: 1 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1816-1819 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of N-Substituted Amino Sulfonic Acids, III1)The synthesis of N-substituted 4-aminobutane-1-sulfonic acids and 3-aminopropane-1-sulfonic acids by the reaction of 1,4-butanesultone and 1,3-propanesultone with primary amines is described.
    Notes: Die Darstellung der N-substituierten 4-Aminobutan-1-sulfonsäuren und 3-Aminopropan-1-sulfonsäuren durch Reaktion von 1,4-Butansulton und 1,3-Propansulton mit primären Aminen wird beschrieben.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 761 (1972), S. 118-120 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of N-Substituted Aminosulfonic AcidsThe syntheses of the N-substituted 4-amino-2,4-dimethyl-1,3-butadiene-1-sulfonic acids 3 and 3-amino-propane-1-sulfonic acids 5 are described.
    Notes: Es werden die Darstellung der N-substituierten 4-Amino-2.4-dimethyl-2.3-butadien-1-sulfonsäuren 3 und 3-Amino-propan-1-sulfonsäuren 5 beschrieben.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 667-670 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of N-Substituted Amino Sulfonic Acids, IIThe synthesis of the N-substituted 3-aminopropane-1 -sulfonic acids 3 by reaction of 1,3- propanesultone with primary amines is described.
    Notes: Die Darstellung der N-substituierten 3-Aminopropan-1-sulfonsauren 3 durch Reaktion von 1,3-Propansulfon mit primaren Aminen wird beschrieben.
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  • 9
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 6 (1993), S. 609-614 
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The kinetics of oxidation of p-aminodiphenylamine with the peroxydisulphate ion were investigated spectrophotometrically. The oxidation was accompanied by the appearance of a wine-red colour, which changed to become colourless. The reaction rate was measured by the stopped-flow technique with a UV spectrophotometer. The reactions proceeded with second-order kinetics, first-order for each individual reactant. Cationic micelles (cetyltrimethyl ammonium bromide) caused an enhancement in the reaction rate followed by inhibition at higher concentrations. Anionic micelles (sodium dodecyl sulphate), on the other hand, had a slightly retarding effect. The effects of radical scavenger, pH and ionic strength on the fast oxidation rate were examined. A mechanism consistent with the observations is discussed.
    Additional Material: 8 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 669-675 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Trichlormethanes 4 react with two equivalents of n-alkyl isocyanates R2-NCO in the presence of SbCl5 to furnish the 2,2-dichloro-5,6-dihydro-6-oxo2H-1,3,5-oxadiazinium salts (9). The structure of these heterocycles is confirmed by an X-ray analysis of 9d (R1 = ClC = CCl2, R2 = Et). p-Tolyl isocyanate is Friedel-Crafts alkylated by 4b in the presence of SbCl5. Subsequent ring closure affords the quinolinium salt 13, which is hydrolyzed to give inter alia the quinolone 16.
    Additional Material: 1 Ill.
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