1,1,3,3-Tetramethyldisiloxane

Laval, S.; Pehlivan, Leyla; Dayoub, Wissam; Métay, Estelle; Lemaire, Mare

doi:10.1002/047084289x.rn01391

Cited by 3 publications

(4 citation statements)

References 65 publications

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“…1,1,3,3‐Tetramethyldisiloxane (TMDS) is the most suitable and simple model difunctional hydrosiloxane for these purposes. Nevertheless, this approach was reported in the literature only once and rather unclearly . Any efforts to carry out the hydrosilylation reaction between TMDS and chloromethylstyrene under the same conditions [Figure (a,b)] usually led to a mixture of products, which were apparently mono‐ and difunctional disiloxanes and unreacted St‐CH 2 Cl (Table , first entry).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of new functional hexamethyltrisiloxanes and telechelic polydimethylsiloxanes based on them

Drozdov

Cherkaev

Демченко

et al. 2018

J of Applied Polymer Sci

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Oligo-and polysiloxanes with terminal functional groups are of great interest in terms of syntheses of siloxane-containing block copolymers by various synthetic methods. In this study, synthesis of bifunctional di-and trisiloxanes with different terminal 4-(phenylene ethylene) substituents was developed using hydrosilylation under mild reaction conditions. Six new trisiloxanes with different functional substituents can be produced either directly by hydrosilylation of 4-substituted styrene derivatives or by consistent conversion of the homologues obtained. All the functional trisiloxanes synthesized are suitable as chain stoppers in the ring-opening polymerization of cyclosiloxanes. We believe that synthesis not only of symmetrical oligosiloxanes but also of asymmetrical hydrodosiloxane-containing analogues is a promising approach. Compounds of this kind will be in demand as precursors for the production of functional siloxane derivatives by the hydrosilylation reaction. Thus, symmetrical or asymmetrical telechelic oligo-or polydimethylsiloxanes with different functional groups are suitable as AA-type blocks for further synthesis of block copolymers.

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Section: Resultsmentioning

confidence: 99%

Synthesis of new functional hexamethyltrisiloxanes and telechelic polydimethylsiloxanes based on them

Drozdov

Cherkaev

Демченко

et al. 2018

J of Applied Polymer Sci

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“…20 During our general study dedicated to finding cleaner reducing agents, we failed to reduce aliphatic nitro compounds using hydrosiloxanes such as PMHS and TMDS. 12 In contrast, we discovered that the same substrates may be selectively reduced into amines by hypophosphite (Table 1). These encouraging observations are part of the reasons for our interest in phosphorus-reducing agents.…”

Section: Introductionmentioning

confidence: 98%

“…10 Unfortunately, they are also expensive, toxic and flammable, and in particular conditions, they produce SiH 4 , which is a dangerous pyrophoric gas. 11 These drawbacks can probably be overcome by using hydrosiloxanes, such as TMDS 12 and PMHS, 10 but the limitation in such cases is the relative high cost of the silicon reagent, at least for the moment.…”

Section: Introductionmentioning

confidence: 99%

Synthetic applications of hypophosphite derivatives in reduction

et al. 2015

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The development of new tools for the reduction of organic functions to reach high chemo- and stereo-selectivity is an important research domain. Although, aluminum and boron hydrides are commonly used, they suffer from environmentally and safety issues. In particular, at industrial scale, the search for more specific and efficient reagents with a lower ecological impact remains one of the main objectives of organic chemists. This review captures highlights from literature concerning phosphonic and phosphinic acid derivatives as reducing agents and evaluates their potential as alternatives, in particular to boron and aluminum hydrides.

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“…We have been exploring the use of poorly reactive reductants in economical and eco-friendly reducing systems. Amongst alternatives, we have studied hydrosiloxanes, 22 hypophosphite derivatives 23 and calcium hydride. 24 Calcium hydride, compared to other hydrides, has the advantage of being stable under air and inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Reductive alkylation of active methylene compounds with carbonyl derivatives, calcium hydride and a heterogeneous catalyst

et al. 2015

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A one-pot two-step reaction (Knoevenagel condensation - reduction of the double bond) has been developed using calcium hydride as a reductant in the presence of a supported noble metal catalyst. The reaction between carbonyl compounds and active methylene compounds such as methylcyanoacetate, 1,3-dimethylbarbituric acid, dimedone and the more challenging dimethylmalonate, affords the corresponding monoalkylated products in moderate to good yields (up to 83%) with minimal reduction of the starting carbonyl compounds.

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1,1,3,3-Tetramethyldisiloxane

Cited by 3 publications

References 65 publications

Synthesis of new functional hexamethyltrisiloxanes and telechelic polydimethylsiloxanes based on them

Synthesis of new functional hexamethyltrisiloxanes and telechelic polydimethylsiloxanes based on them

Synthetic applications of hypophosphite derivatives in reduction

Reductive alkylation of active methylene compounds with carbonyl derivatives, calcium hydride and a heterogeneous catalyst

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