Oligophenyl(fluoro)siloxanes

Basenko, S. V.; Воронков, М. Г.; Boyarkina, E. V.; Лопатин, С. И.; Gebel, I. A.; Зеленков, Лев Е.

doi:10.1134/s1070363208080318

Cited by 4 publications

(3 citation statements)

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“…cis,cis,cis-2,4,6,8-Tetrahydroxy-2,4,6,8-tetraphenylcyclotetrasiloxane was synthesized as an intermediate by the hydrolysis of trichloro(phenyl)silane, which undergoes further condensation to give PPSQ [6]. 2,4,6,8-Tetrachloro-2,4,6,8-tetra-R substituted cyclotetrasiloxanes (R = Me [7], Vi [7], Ph [8]) and 2,4,6,8-tetrahydroxy-2,4,6,8-tetra-R substituted 0022-328X/$ -see front matter Ó 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.jorganchem.2010.02.008 cyclotetrasiloxanes (R = Ph [9], i Pr [10]) were synthesized.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and structure of ladder polymethylsilsesquioxanes from sila-functionalized cyclotetrasiloxanes

Seki

Kajiwara

Abe

et al. 2010

Journal of Organometallic Chemistry

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Section: Introductionmentioning

confidence: 99%

Synthesis and structure of ladder polymethylsilsesquioxanes from sila-functionalized cyclotetrasiloxanes

Seki

Kajiwara

Abe

et al. 2010

Journal of Organometallic Chemistry

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“…In the last decades, non‐hydrolytic processes, including sol‐gel reactions, were found to be very efficient for precise design of siloxane‐based materials. Several types of cross‐coupling reactions of halosilanes with silanols, silanolates, or alkoxysilanes have been reported, but special emphasis must be placed on processes using an extraneous source of oxygen, such as ethers, air or dimethyl sulfoxide . In summary, the development of one‐pot efficient synthesis of siloxanes has continued to intensify in the last decade and will continue to expand in the future.…”

Section: Formation Of Vinylsiloxanes Stabilized By Complexation With ...mentioning

confidence: 99%

“…Several types of cross-coupling reactions of halosilanes with silanols, [12] silanolates, [13] or alkoxysilanes [14] have been reported, but special emphasis must be placed on processes using an extraneous source of oxygen, such as ethers, [15] air [16] or dimethyl sulfoxide. [17] In summary, the development of one-pot efficient synthesis of siloxanes has continued to intensify in the last decade and will continue to expand in the future. In this paper, we report an easy and convenient route to vinylsiloxanes starting from chloroorganosilanes.…”

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confidence: 99%

Copper‐Promoted Formation of Vinylsiloxanes

2020

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The metathesis reactions of chlorovinylsilanes with copper(I) oxide are reported. The process is catalyzed by HCl which can be in situ generated via hydrolysis of chlorosilanes by traces of water present in the system. An appearance of olefin/CuCl π-intermediates can provide a stereoselectivity of Demand for higher performance and higher functionality of siloxane compounds is increasing year by year, and there is a need for techniques capable of precisely controlling the main skeleton of organosilicon products. [1] Special attention is paid to vinyl siloxanes that are highly versatile substrates for a wide range of chemical modification reactions especially copolymerization and hydrosilylation. [2] Poly(vinylsiloxane) provides a flexible middle segment in the copolymers, while vinyl side group may be used as a cross-linker or chain extender. That is how vinylsiloxanes became the favored materials for the preparation of vinyl colloidal quantum dots, [3] vapor deposited silicone polymer thin films, [4] catalysts, [5] optically transparent hybrid network polymers, [6] porous cross-linked networks, [7] inks for copper direct-write [8] and even of dental impression polymers. [9] There are several methods for Si-O-Si bond formation, but most of them either are multistage with huge amount of byproduct or require the use of specific substrates [10] other than organochlorosilanes manufactured by the Rochow process. A conventional method for the synthesis of siloxane from chlorosilanes is hydrolysis promoting dehydrative condensation of the formed silanol intermediates. Since the reactivity of organochlorosilanes is much greater than that of allylsilanes or organohydrosilanes, that is why organochlorosilanes are used mainly as polysiloxane precursors or as surface modifiers. [1] In addition, in the case of organodichloro-and organotrichlorosilanes, a spontaneous self-condensation of silanols makes it difficult to control structurally well-defined siloxane compounds. Another disadvantage of most hydrolytic reactions is that a hydrogen chloride scavenger is required to shift the equilibration toward the desired siloxane, and the fact that time-consuming, laborious step of phase separation must be carried out. In the last decades, non-hydrolytic processes, [1] including sol-gel reac- [a]

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