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  • 1970-1974  (1)
  • 1960-1964  (3)
  • Chemistry  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 73 (1961), S. 15-22 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Synthese von purin-ähnlichen biheterocyclischen Ringsystemen wird beschrieben und insbesondere der Aufbau von verschieden substituierten Pyrazolo[3.4-d] pyrimidinen ausgehend von Pyrazolen oder Pyrimidinen besprochen. Synthesewege für Pyrazolo[3.4-c] pyridazine und Pyrazolo[3.4-b] pyridine ausgehend von Pyridazinen und Pyridinen und von Pyrazolo[3.4-b] pyrazinen und Pyrazolo[3.4-d] triazinen ausgehend von Pyrazolen werden angegeben. Als biheterocyclisches Ringsystem mit zwei kondensierten 6-Ringen werden die Pyrimido[4.5-d] pyrimidine erwähnt.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 996-999 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of 4-hydrazino-benzo-1,2,3-thiadiazine 1,1-dioxides is described. Chemical reactions and properties of these compounds are discussed. Some of the derivatives show hypotensive as well as diuretic activity.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Condensation of 3-amino-4-carbethoxy-pyrazoles with nitriles led to a new synthesis of 6-C-substituted pyrazolo[3,4-d]pyrimidines and 6-amino-pyrazolo-[3,4-b]pyridines. The structure of the new derivatives was established by independent syntheses. The pyrazolo-pyrimidines can be cleaved with phosphoric acid to 3-amino-pyrazole-4-carboxamide derivatives. Many of the new pyrazolo-pyrimidines show an increase of coronary flow.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 409 (1974), S. 60-68 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Oxopalladate Na2Pd3O4Hithertoo unknown Na2Pd3O4 was prepared. The black rod-shaped single crystals are orthorhombic, a = 3.043, b = 5.446, c = 13.175 Å, drö = 6.50 g · cm-3, dpyk = 6.43 g · cm-3, D252h-I mmm. For parameters see text.There are Pd3O4 double-layers normal to [001], which are connected with eachother by Na in a trigonal prismatic coordination. The MADELUNG part of lattice energy (MAPLE) is calculated for Na2Pd3O4 and compared with those of the binary oxids. MAPLE for a hypo-thetical form of Pd3O4 is discussed in comparison to the “isolated” double-layer Pd3O4.
    Notes: Neu dargestellt wurde Na2Pd3O4, der erste Vertreter von Oxiden des Palladiums dieses Formeltyps. Die schwarzen stäbchenförmigen Kristalle kristallisieren orthorhombisch mit a = 3,043, b = 5,466, c = 13,175 Å, drö = 6,50 g · cm-3, dpyk = 6,43 g · cm-3 Z = 2 in D252h-I mmm; Punktlagen und Parameter vgl. Text.Es liegen Pd3O4-Doppelschichten senkrecht zu [001] vor, die durch Na in trigonalprismatischer Koordination miteinander verbunden werden. Der MADELUNQ- Anteil der Gitterenergie, MAPLE, wird für Na2Pd3O4 berechnet und mit denen der binären Oxide verglichen. Diskutiert wird ferner MAPLE für eine hypothetische Form von Pd3O4 im Vergleich MAPLE für die “isolierte” Doppelschicht Pd3O4.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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