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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 669-683 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (Z)-3-(Diethylboryl)-2-(trimethylsilyl)-2-pentene (B), obtainable from sodium triethyl-1-propynylborate (A) and chlorotrimethylsilane reacts with alkaline metal amides MNH2 (M=Na, K) under elimination of methane to give the alkaline metal 4,5,5-triethyl-2,5-dihydro-2,2,3-trimethyl1,2,5-azoniasilaboratoles C1 and C2. On warming, C1 and C2 eliminate ethane to form 1-alkaline metal-4,5-diethyl-2,5-dihydro-2,2,3-trimethyl-1,2,5-azasilaboroles [alkaline metal=Na (1a); K(1b)]. From 1a the NH compounds 2a are obtained with HCl/ether and the NCH3 compound 2b with CH3l. 1a reacts with the chlorides (CH3)3SiCl, (CH3)2SiCl2, CH3SiCl3, SiCl4, (CH3)3GeCl, (C6H5)3GeCl, (CH3)3SnCl, (C6H5)2PCI, (C6H5)2AsCl, (C2H5)2BCl, C8H14BCI, AlCl3,(C2H5)2AlCl, FeCl2 oder CoCl2 to give the N-heteroatomsubstituted heterocycles [4a: R=Si(CH3)3; 5a: R=Ge(CH3)3, 5b: R=Ge-(C6H5)3; 6: R=Sn(CH3); 7a: R=NHCH3, 7b: R=NHC6H5; 8: R=P(C6H5)2; 9: R=As(C6H5)2; 10a: R=B(C2H5)2, 10b: R=BC8H14; 11a: R=AlCl2 (11b)2: R=Al(C2H5)2], R′[NSi(CH3)2C(CH3)=C(C2H5)2 [4a-4a: und R″[NSi(CH3)2C(CH3)=C(C2H5)B(C2H5)B(C2H5)]3 [4a-4a-4a: R = Si(CH3)2; (12)2: R′ = Fe; (13)2: R′ = Co], and [4a-4a-4a: R = SiCH3, 4b-4b-4b: R′ = SiCl]. From 2b and primary aliphatic or aromatic amines H2NR [R=C8H17, CH2C6H5, C6H5] und Diaminen H2N-R′-NH2 (R′=-[CH2]2, -[CH2]6-, -1,4-C6H4-, 2-H2NC6H4-) are obtained the corresponding N-substituted heterocycles with R=C8H17 (2d), CH2C6H5 (2e), C6H5 (3a), 2-H2NC6H4 (3b) bzw. mit R′=-[CH2]2- (2a-2a), -[CH2]6- (2c-2c) und-1,4-C6H4 (3a-3a) under transamination. 2b and monoorganohydrazines H2N-NHR (R=CH3, C6H5) react under transamination to give mixtures of 7a or b together with the isomeric 5,6-diethyl-1(2)-organo-1,2,3,6-tetrahydro-3,3,4-trimethyl-1,2,3,6-diazasilaborines 14a, 14′a and 14b. The structure of (122 is determined by an X-ray analysis.
    Notes: Das aus Natrium-triethyl-1-propinylborat (A) und Chlortrimethylsilan zugängliche (Z)-3-(Diethylboryl)-2-(trimethylsilyl)-2-penten (B) reagiert mit Alkalimetallamiden MNH2 (M=Na, K) unter Methan-Abspaltung zu Alkalimetall-4,5,5-triethyl-2,5-dihydro-2,2,3-trimethyl-1,2,5-azoniasilaboratolen C1 und C2, aus denen beim Erwärmen unter Freisetzen von Ethan 1-Alkalimetall-4,5-diethyl-2,5-dihydro-2,2,3-trimethyl-1,2,5-azasilaborole [Alkalimetall=Na (1a), K (1b)] gewonnen werden. Aus 1a werden mit HCI/Ether die NH-Verbindung 2a und mit CH3I die N-Methyl-Verbindung 2b hergestellt. Mit den Chloriden (CH3)3SiCl, (CH3)2SiCl2, CH3SiCl3, SiCl4, (CH3)3GeCl, (C6H5)3GeCl, (CH3)3SnCl, (C6H5)2PCI, (C6H5)2AsCl, (C2H5)2BCl, C8H14BCI, AlCl3,(C2H5)2AlCl, FeCl2 oder CoCl2 erhält man aus 1a die N-Heteroatom-substituierten Heterocyclen [4a: R=Si(CH3)3; 5a: R=Ge(CH3)3, 5b: R=Ge-(C6H5)3; 6: R=Sn(CH3); 7a: R=NHCH3, 7b: R=NHC6H5; 8: R=P(C6H5)2; 9: R=As(C6H5)2; 10a: R=B(C2H5)2, 10b: R=BC8H14; 11a: R=AlCl2 (11b)2: R=Al(C2H5)2], [4a-4a: R = Si(CH3)2; (12)2: R′ = Fe; (13)2: R′ = Co] und [4a-4a-4a: R = SiCH3, 4b-4b-4b: R′ = SiCl] 2b reagiert mit primären aliphatischen oder aromatischen Aminen H2NR [R=C8H17, CH2C6H5, C6H5] und Diaminen H2N-R′-NH2 (R′=-[CH2]2, -[CH2]6-, -1,4-C6H4-, 2-H2NC6H4-) unter Transaminierung zu den N-substituierten Heterocyclen mit R=C8H17 (2d), CH2C6H5 (2e), C6H5 (3a), 2-H2NC6H4 (3b) bzw. mit R′=-[CH2]2- (2a-2a), -[CH2]6- (2c-2c) und-1,4-C6H4 (3a-3a). Mit Monoorganohydrazinen H2N-NHR (R=CH3, C6H5) bilden sich aus 2b unter Transaminierung Gemische von 7a bzw. b und den isomeren 5,6-Diethyl-1(2)-organo-1,2,3,6-tetrahydro-3,3,4-trimethyl-1,2,3,6-diazasilaborinen 14a, 14′a bzw. 14b. Die Struktur von 122 wird durch Röntgenstrahlbeugung ermittelt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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