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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 568 (1989), S. 157-164 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 2,4,6-Tri-tert.butylphenyl Substituted Silanes2,4,6-Tri-tert.butylphenyl lithium reacts with trimethoxysilane, triethoxysilane, and triphenoxysilane to give the dialkoxy- or diphenoxy-(2,4,6-tri-tert.butylphenyl)-silanes Ar—SiH(OR1)2 3—5 (Ar = 2,4,6-tri.tert.butylphenyl, R1 = Me, Et, Ph). Interaction of methyl lithium or n-butyl lithium with 3-5 leads under partial or complete substitution of the OR1-functions to the silanes Ar—SiH(OR1)R2 7-11 and Ar—SiHR22 12 and 13 (R2 = Me, Bu). Reaction of 3 with lithium tert.butul-amide gives tert.butylamino-methoxy-(2,4,6-tri-tert.butylphenyl)-silane 14. 5 is reduced by LiAlH4 to 2,4,6-tri-tert.butylphenyl-silane 6. The reaction of 3 with antimony trifluoride results in formation of 2,4,6-tri-tert.butylphenyl trifluorosilane 2. Attempts to replace the alkoxy or phenoxy groups in 3-5 by chlorine led under silion carbon bond cleavage to 1,3,5-tri-tert.butylbenzene.
    Notes: 2,4,6-Tri-tert.butylphenyllithium reagiert mit Trimethoxy-, Triethoxy und Triphenoxysilan zu den Dialkoxy- bzw. Diphenoxy-(2,4,6-tri-tert.butylphenyl)-silanen Ar—SiH(OR1)2 3-5 (Ar = 2,4,6-Tri-tert.butylphenyl, R1 = Me, Et, Ph). Die Einwirkung von Methyl-oder n-Butyllithium auf 3-5 liefert unter partieller oder vollständiger Substitution der OR1- Funktionen die Silane Ar—SiH(OR1)R2 7-11 und Ar—SiHR22 12 und 13 (R2 = Me, Bu). Mit Lithium-tert.butylamid reagiert 3 zu tert.Butylamino-methoxy-(2,4,6-tri.butylphenyl)-silan 14. Durch LiAlH4 wird 5 zu 2,4,6-Tri-tert.butylphenylsilan 6 reduziert. Die Umsetzung von 3 mit Antimontrifluorid führt zu 2,4,6-Tri-tert.butylphenyl-trifluorisilan 2. Versuche, die Alkoxy- bzw. Phenoxygruppierungen in 3-5 durch Chlor auszutauschen, führten zur Spaltung der Silicium-Kohlenstoff-Bindung und Bildung von 1,3,5-Tri-tert.butylbenzen.
    Type of Medium: Electronic Resource
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