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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and structure of as-triazinoquinazolines. 3 (1990)
    s.l. : American Chemical Society
    The @journal of organic chemistry 55 (1990), S. 344-347 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00288a060
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and Structures of as-Triazinoquinazolines, I (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1077-1082 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese und Struktur von as-Triazinochinazolinen, IDie 3-(Methylthio)-6-R-1,2,4-triazin-5(2H)-one 1 - 6 wurden durch Cyclokondensation mit Anthranilsäure in die 3-R-2H-as-triazino[3.2-b]chinazolin-2,6(1H)-dione 8 - 13 übergeführt. Reaktion von 2-Methyl-3-(methylthio)-6-phenyl-1,2,4-triazin-5(2H)-on (23) mit Anthranilsäure ergab 1-Methyl-3-phenyl-2H-as-triazino[3,4-b]chinazolin-4,6(1H)-dion (29) über das Zwischenprodukt 26. N-Methylanthranilsäure setzte sich mit 2 und 5 zu den 11-Methyl-3-R-2H-as-triazino-[3,2-b]chinazolin-2,6(11H)-dionen 36 und 38 um.
    Notes: 3-(Methyltio)-6-R-1,2,4-triazin-5(2H)-ones 1 - 6 have been converted into the 3-R-2H-as-tri-azino[3,2-b]quinazoline-2,6(1H)-diones 8 - 13 upon cyclocondensation with anthranilic acid. Reaction of 2-methyl-3-(methylthio)-6-phenyl-1,2,4-triazin-5(2H)-one (23) with anthranilic acid gave 1-methyl-3-phenyl-2H-as-triazino[3,4-b]quinoazoline-4,69 (1H)-dione (29) via the intermediate 26. N-Methylanthranilic acid and 2 or 5 afforded the 11-methyl-3-R-2H-as-triazino[3,2-b]quinazoline-2,6(11H)-diones 36 and 38, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170322
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and Structure of as-Triazinoquinazolines, II (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1083-1088 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese und Struktur von as-Triazinochinazolinen, II1)Die 4-Amino-3-(methylthio)-6-R-1,2,4-triazin-5(4H)-one 6 - 10 ergaben bei der Umsetzung mit Anthranilsäure die 1-Amino-3-R-2H-as-triazino[3,2-b]chinazolin-2,6(1H)-dione 17 - 21 anstelle der erwarteten as-Triazino[3,4-b][1,3,4]benzotriazepine 12 - 16. Die Verbindungen 17 - 21 ließen sich zu 22 - 26 desaminieren. Erhitzen der N-Benzylidenderivate von 6 - 10 (27 - 31) mit Anthranilsäure führte unter Freisetzung von Benzonitril ebenfalls zu 22 - 26.
    Notes: 4-Amino-3-(methylthio)-6-R-1,2,4-triazin-5(4H)-ones 6 - 10 react with anthranilic acid to yield the 1-amino-3-R-2H-as-triazino[3,2-b]quinazoline-2,6(1H)-diones 17 - 21 rather than the expected as-triazino[3,4-b][1,3,4]benzotriazepines 12 - 16. Compounds 17 - 21 were deaminated into compounds 22 - 26. Heating of the N-benzylidene derivatives of 6 - 10 (27 - 31) with anthranilic acid also led to the formation of 22 - 26 with extrusion of benzonitrile.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170323
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and structure of some condensed quinazolines (1990)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1990 (1990), S. 815-817 
    Details
    ISSN: 0170-2041
    Keywords: Quinazolines, hydrazino- ; Triazoloquinazolines ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Condensation of 2-hydrazino-4(3H)-quinazolinone (1) with bielectrophilic reagents gives the corresponding triazoloquinazolines 8, the structures of which were established by selective synthesis through deamination of their N-amino derivatives. The synthesis of methyl-substituted derivatives of these angular tricyclic systems and their linear isomers was also achieved starting with 3-methyl- and 1-methyl-2-hydrazino-quinazolinone.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1990199001151
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and structure of some thiazole derivatives (1990)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1990 (1990), S. 393-395 
    Details
    ISSN: 0170-2041
    Keywords: Thiosemicarbazones ; Thiocarbazones ; Thiazole derivatives ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The addition of thiosemicarbazones 1 to α-halo acids 2 is shown to give 2-hydrazino-2-thiazolin-4-ones 3 and not 3-substituted 2-imino-3-(methyleneimino)thiazolidin-4-ones 4. The independent synthesis of 2-thiazolin-4-one derivatives 3 is also described.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199019900174
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and potentiometric study of acyclic monoxadiamides as ionophores in ion-selective electrodes (1990)
    Weinheim : Wiley-Blackwell
    Electroanalysis 2 (1990), S. 119-125 
    Details
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Seven compounds of a new class of ionophores, acyclic monoxadiamides, were synthesized and tested for the potentiometric selectivity for lithium ion, in polyvinyl chloride (PVC) membrane electrodes. Four different plasticizers were studied: o-nitrophenyloctyl ether (NPOE), o-nitrophenylphenyl ether (NPPE), o-nitrophenylbutyl ether (NPBE), and o-nitrophenylbenzyl ether (NPBnE), as was the addition of trioctylphosphine oxide (TOPO). The ionophore o-carboxyphenoxyacetic acid dimorpholide (Ig) exhibited sodium-lithium selectivity, KLi, Napot, of 0.018 by the matched-potential method in the presence of 1% TOPO using NPBE plasticizer. The presence of TOPO generally causes a substantial increase in the lithium selectivity, but it decreases the slopes of the calibration curves. Selectivities are reported for sodium, potassium, ammonium, barium, and calcium ions with respect to the lithium ion.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140020207
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