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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 1701-1707 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Synthesis of Carbon Suboxide and its Reactions with Silylated Amines and SilanolsThe thermolysis of bis(trimethylsilyl) malonate (1) in the presence of phosphorus pentoxide at about 160°C yields 54% carbon suboxide (3). The reaction mechanism and the apparatus are described. - The addition of 3 to hexamethyldisilazane (7) leads to the formation of 2,4-dioxo-6-trimethylsiloxy-1-trimethylsilyl-1,2,3,4-tetrahydro-3-pyridine [N, N-bis(trimethylsilyl) carboxamide] (10) or an isomer of 10. Methanolysis of 10 yields 2,4,6-trioxo-3-piperidinecarboxamide (12) at about 100°C 10 is converted, with elimination of trimethylsilanol, into 2.4.6-tris(trimethylsiloxy)-3-pyridinecarbonitrile (14). 1-Methyl-2,4-dioxo-6-trimethylsiloxy-1,2,3,4-tetrahydro-3-pyridine [N-methyl-N-(trimethylsilyl) carboxamide] (11) formed from 3 and N-(trimethylsilyl)methylamine is methanolyzed to 1-methyl-2,4,6-trioxo-3-piperidine (N-methylcarboxamide) (13). - 3 reacts with trimethyl- (16)triethyl- (17) and triphenylsilanol (18). to yield bis (silyl) malonates 1, 19, and 20, respectively.
    Notes: Die Thermolyse von Malonsäure-bis(trimethylsilylester) (1) liefert in Gegenwart von Phosphorpentoxid bei etwa 160°C 54% Kohlensuboxid (3). Der Reaktionsmechanismus und die Apparatur werden beschrieben. - Die Addition von 3 an Hexamethyldisilazan (7) führt zu 2,4 Dioxo-6-trimethylsiloxy-1-trimethylsily-1,2,3,4-tetrahydro-3-pyridin[N, N-bis(trimethylsilyl) carboxamid] (10) bzw. einem Isomeren. 10 ergibt durch Methanolyse 2,4,6-Trioxo-3-piperidincarboxamid (12) bei etwa 100°C wird 10 unter Silanolabspaltung in 2,4,6-Tris(trimethylsiloxy)-3-pyridincarbonitril (14) übergeführt. - Das aus 3 und N-(Trimethylsilyl) methylamin (8) entstehende 1-Methyl-2,4-dioxo-6-trimethylsiloxy-1,2,3,4-tetrahydro-3-pyridin(N)-methyl-N-(trimethylsilyl)carboxamid (11) wird methanolytisch zu Methyl-2,4,6-trioxo-3-piperidin (N-methylcarboxamid) (13) gespalten. - 3 gibt mit Trimethyl- (16), Triäthyl- (17) und Triphenylsilanol (18) Malonsäure-bis-(silylester) 1, 19 und 20.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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