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• 307531-92-6 1,3,5,7,9,11,14-heptaisobutyltricyclo[7.3.3.15,11]heptasiloxane-endo-3,7,14-triol 
• 1719-58-0 Chlorodimethylvinylsilane 
• 1351415-92-3 (2-methylallyl)-dimethylvinylsilane 
• 7691-02-3 1,3-Divinyl-1,1,3,3-tetramethyl-disilazan(germ.)=divinyltetramethyldisiloxane 

Relevant academic research and scientific papers

A Highly Effective Route to Si?O?Si Moieties through O-Silylation of Silanols and Polyhedral Oligomeric Silsesquioxane Silanols with Disilazanes

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.

Vinyl-Functionalized Silsesquioxanes and Germasilsesquioxanes

We report herein an efficient procedure for the synthesis of new polyhedral oligomeric silsesquioxane (POSS) derivatives as multifunctional reagents. This study concerns the incompletely condensed silsesquioxanes and germasilsesquioxanes with vinyl-substituted silyl and germyl functional groups, which allow further modification. Furthermore, our experiments have been extended to the synthesis of a new subclass of completely condensed vinylgermasilsesquioxanes. These hybrid building blocks were obtained selectively within a few hours and isolated with excellent yields.

Synthesis and Hydrosilylation of Vinyl-Substituted Open-Cage Silsesquioxanes with Phenylsilanes: Regioselective Synthesis of Trifunctional Silsesquioxanes

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.

Highly Efficient Catalytic Route for the Synthesis of Functionalized Silsesquioxanes

Silsesquioxanes (POSS) have recently become the subject of growing interest in many branches of materials chemistry. Despite this great interest, no direct metal-catalyzed method to cap the corner of the POSS molecules has yet been proposed. In this report, we present a highly efficient method for the synthesis of functionalized silsesquioxanes mediated by scandium(III) triflate, which opens up the possibility of introducing a wide variety of functional groups into this class of organosilicon compounds under mild conditions with excellent yields. We also investigated the differences in the activity of the Lewis acid (Sc(OTf)3) and the hidden Br?nsted acid (TfOH) generated in situ from triflates as catalysts in the functionalization of silsesquioxanes. What is more, this solution provides an efficient corner-capping reaction and other functionalizations to obtain silsesquioxane derivatives which are often not possible to synthesize with good yields, efficiency, and chemoselectivity using conventional methods.

POLYEDRIC OLIGOMERIC SILICON/OXYGEN CLUSTER WITH AT LEAST ONE ALDEHYDE GROUP AND METHOD FOR PRODUCTION THEREOF

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.