Direct alkoxysilylation of alkoxysilanes for the synthesis of explicit alkoxysiloxane oligomers

Ryutaro Wakabayashi, Misa Tamai, Kazufumi Kawahara, Hiroki Tachibana, Yutaka Imamura, Hiromi Nakai, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Direct alkoxysilylation, which is a powerful tool to provide explicit alkoxysiloxanes, is developed and its versatility is investigated. Siloxane pentamers Si[OSiR 1(OMe) 2] 4 having various functional groups (R 1 = methyl, vinyl, phenyl, chloropropyl and n-butyl groups) were successfully obtained by direct alkoxysilylation of Si(OR) 4 (R = t-Bu, CHPh 2). Thus, the versatility of the reaction is confirmed on organic functional groups R 1. Functional group tolerance of the reaction is discussed on the basis of electronegativity of the R 1 groups. Alkoxysilylation of Si(Ot-Bu) 2(OMe) 2 and Si(Ot-Bu)(OMe) 3 selectively gives trimer (MeO) 2Si[OSiMe(OMe) 2] 2 and dimer (MeO) 3SiOSiMe(OMe) 2, respectively. Thus, the feasibility on siloxane structure is also confirmed. Various siloxane compounds are synthesized by this newly developed reaction for the first time.

    Original languageEnglish
    Pages (from-to)26-31
    Number of pages6
    JournalJournal of Organometallic Chemistry
    Volume716
    DOIs
    Publication statusPublished - 2012 Oct 1

    Fingerprint

    Siloxanes
    oligomers
    Oligomers
    Functional groups
    siloxanes
    synthesis
    versatility
    Electronegativity
    Dimers
    trimers
    dimers

    Keywords

    • Alkoxysilanes
    • Lewis acids
    • Nonhydrolytic synthesis
    • Siloxanes
    • Sol-gel processes

    ASJC Scopus subject areas

    • Inorganic Chemistry
    • Organic Chemistry
    • Physical and Theoretical Chemistry
    • Materials Chemistry
    • Biochemistry

    Cite this

    Direct alkoxysilylation of alkoxysilanes for the synthesis of explicit alkoxysiloxane oligomers. / Wakabayashi, Ryutaro; Tamai, Misa; Kawahara, Kazufumi; Tachibana, Hiroki; Imamura, Yutaka; Nakai, Hiromi; Kuroda, Kazuyuki.

    In: Journal of Organometallic Chemistry, Vol. 716, 01.10.2012, p. 26-31.

    Research output: Contribution to journalArticle

    Wakabayashi, Ryutaro ; Tamai, Misa ; Kawahara, Kazufumi ; Tachibana, Hiroki ; Imamura, Yutaka ; Nakai, Hiromi ; Kuroda, Kazuyuki. / Direct alkoxysilylation of alkoxysilanes for the synthesis of explicit alkoxysiloxane oligomers. In: Journal of Organometallic Chemistry. 2012 ; Vol. 716. pp. 26-31.
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    AU - Tachibana, Hiroki

    AU - Imamura, Yutaka

    AU - Nakai, Hiromi

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