544692-95-7Relevant articles and documents
A Highly Effective Route to Si?O?Si Moieties through O-Silylation of Silanols and Polyhedral Oligomeric Silsesquioxane Silanols with Disilazanes
Kuciński, Krzysztof,Hreczycho, Grzegorz
, p. 1043 - 1048 (2019)
A simple and highly practical catalyst-free O-silylation of silanols with commercially available disilazanes has been developed under mild conditions. In the case of polyhedral oligomeric silsesquioxane (POSS) silanols and some other silanols, it was necessary to use catalytic amounts of inexpensive Bi(OTf)3 as additional catalyst. This efficient chlorine-free protocol involves the synthesis of a wide range of important organosilicon derivatives such as unsymmetrical disiloxanes and functionalized silsesquioxanes.
Synthesis and Hydrosilylation of Vinyl-Substituted Open-Cage Silsesquioxanes with Phenylsilanes: Regioselective Synthesis of Trifunctional Silsesquioxanes
Grzelak, Magdalena,Januszewski, Rafa?,Marciniec, Bogdan
, (2020)
Herein, we report an efficient synthesis and functionalization of trifunctional open-cage-type silsesquioxanes. The method proposed has been successfully applied for the synthesis of a library of incompletely condensed silsesquioxanes with vinyldiorganosilyl functional groups, which allows further modification. Detailed studies of hydrosilylation of sterically different open-cage vinylsilsesquioxanes with a wide spectrum of phenylsilanes catalyzed by platinum and rhodium compounds are also reported. The influence of the reaction parameters, types of reagents, and catalysts employed on the efficiency of the process was examined. Optimization of the process based on the above results permitted the design of a very attractive method for the synthesis of multifunctionalized silsesquioxanes with excellent yields and regioselectivity. Moreover, the results allowed the choice of the most efficient catalyst whose application led to the selective formation of substituted open-cage silsesquioxanes. These new compounds have been fully characterized and studied in terms of their thermal properties.
POLYEDRIC OLIGOMERIC SILICON/OXYGEN CLUSTER WITH AT LEAST ONE ALDEHYDE GROUP AND METHOD FOR PRODUCTION THEREOF
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Page/Page column 14, (2008/06/13)
The invention relates to polyedric oligomeric silicon/oxygen clusters characterised by a structure of formula: [(RaXbArSiO1,5)m (RcXdAsSiO)n (ReXfAtSi2O2,5)o (RgXhAuSi2O2)p] where a, b, c and r = 0-1, d and s = 0-2, e, g, f, and t = 0-3, h and u = 0-4, m+n+o+p = 4-14, a+b+r = 1, c+d+s = 2, e+f+t = 3, g+h+u = 4, r+s+t+u = 1, R = H, alkyl, cycloalkyl, alkinyl, cycloalkinyl, aryl, heteroaryl, or a polymeric group, which is substituted or unsubstituted, an alkenyl or cycloalkenyl group with no hydrogen atoms directly on the double bond, or further functionalised polyedric, oligomeric silicon/oxygen cluster units bonded by means of a polymeric unit or a bridging unit, X = oxy, hydroxy, alkoxy, carboxy, silyl, alkylsilyl, alkoxysilyl, siloxy, alkylsiloxy, alkoxysiloxy, silylalkyl, alkoxysilylalkyl, alkylsilylalkyl, halogen, epoxy, ester, fluoroalkyl, isocyanate, protected isocyanate, acrylate, methacrylate, mercapto, nitrile, amino, phosphine group or at least one such group from the substituents of type R comprising type X, A = a substituent with at least one aldehyde group, whereby substituents of type R, type A and also type X are the same or different and comprising at least one substituent, preferably of type A and method for production thereof.
