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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of pyrimido[4′,5′:4,5]thieno[2,3-c]-pyridazine derivatives (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 537-547 
    Details
    ISSN: 1434-4475
    Keywords: Thieno[2,3-c]pyridazine-6-carboxamide ; 5,6,7,8-Tetrahydropyrimido[4′,5′:4,5]-thieno[2,3-c]pyridazines ; 7,8-Dihydropyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines ; Pyrimido[4′,5′:4,5]thieno-[2,3-c]pyridazines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Einfache Synthesen von 3,4-Diphenyl-8-oxo-6-substituierten-5,6,7,8-tetrahydropyrimido[4′,5′:4,5]thieno[2,3-c]pyridazinen (4a-g), 3,4-Diphenyl-8-oxo-6-substituierten-7,8-dihydropyrimido[4′,5′:4,5]thieno[2,3-c]pyridazinen (5a-g), 8-Chlor-3,4-diphenyl-6-substituierten Pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazinen (6a-g) und 3,4,6-Triphenyl-8-substituierten-pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazinen (7a-f) aus 4-Cyano-5,6-diphenylpyridazin-3(2H)-thion (1)via 5-Amino-3,4-diphenylthieno[2,3-c]pyridazin-6-carboxamid (3) werden beschrieben.
    Notes: Summary Convenient syntheses of 3,4-diphenyl-8-oxo-6-substituted-5,6,7,8-tetrahydropyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (4a-g), 3,4-diphenyl-8-oxo-6-substituted-7,8-dihydropyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (5a-g), 8-chloro-3,4-diphenyl-6-substituted-pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (6a-g), and 3,4,6-triphenyl-8-substituted-pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (7a-f) from 4-cyano-5,6-diphenylpyridazine-3(2H)-thione (1)via 5-amino-3,4-diphenyl-thieno[2,3-c]pyridazine-6-carboxamide (3) are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807079
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  • 2
    Electronic Resource
    Electronic Resource
    A general route for the synthesis of pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine derivatives (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 739-745 
    Details
    ISSN: 1434-4475
    Keywords: Pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine derivatives ; Thieno[2,3-c]pyridazine-6-carbonitrile ; N,N-Dimethyldichloromethyleniminium chloride ; Enaminonitrile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurde ein einfacher Syntheseweg für 8-substituierte Pyrimido[4′,5′:4,5]thieno-[2,3-c]pyridazine entwickelt. Die Reaktion verläuft über den Ringschluß eines heterocyclischen Aminonitrilvorläufers (3) nach Umsetzung mit Dichlormethylen-dimethylammoniumchlorid.
    Notes: Summary A facile synthesis of 8-substituted pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (6a–i) has been accomplished. The sequence involves the ring closure of a heterocyclic aminonitrile precursor (3) after reaction with (dichloromethylene)-dimethylammonium chloride.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00817265
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis of new pyridazino[4′,3′:4,5]-thieno[3,2-d]-1,2,3-triazine and pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine derivatives (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 1037-1043 
    Details
    ISSN: 1434-4475
    Keywords: Thieno[2,3-c]pyridazine-6-carboxamide ; Pyridazino[4′,3′:4,5]thieno[3,2-d]1,2,3-triazines ; Pyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines ; Pyridazines ; 1,2,3-Triazines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Folgende Verbindungen wurden ausgehend von 5-Amino-3,4-diphenylthieno[2,3-c]pyridazin-6-carboxamid (1) synthetisiert: 8,9-Diphenylpyridazino[4′,3′:4,5]thieno[3,2-d]-1,2,3-triazin-4(3H)-on (2), 3-substituierte 8,9-Diphenylpyridazino[4′,3′:4,5]thieno[3,2-d]-1,2,3-triazin-4(3H)-one (3a–c), 3,4-Diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazin-8[7H]-on (4), 8-Chlor-3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazin (5), 8-substituierte 3,4-Diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine (6a–h) und 7-substituierte 3,4-Diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazin-8(7H)-one (7a–c).
    Notes: Summary 8,9-Diphenylpyridazino[4′,3′:4,5]thieno[3,2-d]-1,2,3-triazin-4(3H)-one (2), 3-substituted 8,9-diphenylpyridazino[4′,3′:4,5]thieno[3,2-d]-1,2,3-triazin-4(3H)-ones (3a–c), 3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazin-8(7H)-one (4), 8-chloro-3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazine (5), 8-substituted 3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazines (6a–h) and 7-substituted 3,4-diphenylpyrimido[4′,5′:4,5]thieno[2,3-c]pyridazin-8(7H)-ones(7a–c) were synthesized from 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-carboxamide (1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807576
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