4-Silalactones and 4-silalactams

Миронов, В. Ф.; Fedotov, N. S.; Kozlikov, V. L.

doi:10.1007/bf00943903

Cited by 7 publications

(16 citation statements)

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“…In particular, siloxane incorporation has been used to tailor specific properties of an existing base macromolecular function to give hybrid polymers possessing a tunable range of performance. These hybrid systems include the following: poly(silarylene−siloxane)s, poly(imide−siloxane)s, sol−gels, siloxane-modified epoxy resins, phenolic compounds, , vinyl ester resins, polysulfones, polycarbonates, polyurethanes, polyesters, and a variety of block copolymers…”

Section: Introductionmentioning

confidence: 99%

Perfluorocyclobutane Aromatic Polyethers. Synthesis and Characterization of New Siloxane-Containing Fluoropolymers

1996

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The synthesis and characterization of siloxane-containing perfluorocyclobutane (PFCB) aromatic polyethers, a new class of fluorosiloxane polymers possessing a well-defined linear structure of alternating disiloxanyl-p-phenylene (cis/trans)-1,2-disubstituted perfluorocyclobutyl ether linkages with known fluoroolefin end groups, is described. The unexpected formation of an aryl Grignard reagent from 4-[(trifluorovinyl)oxy]bromobenzene (2) allowed for the high-yield synthesis of 4-[(trifluorovinyl)oxy]phenyldimethylsilane (3) which was dehydrogenatively hydrolyzed in situ and condensed to bis[1,3-[4-[(trifluorovinyl)oxy]phenyl]]-1,1,3,3-tetramethyldisiloxane monomer (4). Thermal cyclopolymerization in the bulk produces poly(1,1,3,3-tetramethyldisiloxanyl-p-phenylene-1-oxaperfluorocyclobutylene-2-oxa-p-phenylene) (5) as a clear, flexible, and thermally stable elastomeric film. Copolymerization of 4 with a trifunctional PFCB monomer gives a toughened thermoset with good thermal stability. Monomers and polymers were characterized by 1H, 13C, and 19F NMR and FTIR spectroscopy. Number-average molecular weights were determined by gel permeation chromatography and, when possible, quantitative 19F NMR end group analysis. Synthesis, characterization, thermal analyses, and current scope of PFCB polymer chemistry are discussed.

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Section: Introductionmentioning

confidence: 99%

Perfluorocyclobutane Aromatic Polyethers. Synthesis and Characterization of New Siloxane-Containing Fluoropolymers

1996

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“…If the monomers do not intramolecularly cyclize, polymer growth can occur despite the fact that oligomers formed during the reaction may cyclize. Intramolecular cyclization of monomers 1 – 3 to form strained four‐ or five‐membered rings is not likely, a hypothesis supported by a published report in which the corresponding AB monomers led exclusively to oligomeric products on treatment with Pt catalyst (Scheme ) 27…”

Section: Resultsmentioning

confidence: 88%

Hyperbranched polymers from propargyloxysilanes: New types of acetylenic resins

Xiao

Son

2001

J. Polym. Sci. A Polym. Chem.

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New hyperbranched polymers (1P-3P) from propargyloxysilanes (1-3) are described. The propargyloxysilanes were prepared from readily available reagents in 53-61% yields. The polymerizations were clean, one-pot hydrosilylation processes catalyzed by Pt/C that were typically complete within 3 h. The polymers contained pendant acetylenic groups that underwent thermally induced crosslinking reactions. Heating the polymers to 1300°C in flowing nitrogen resulted in weight losses ranging from 33 to 66%. Methyl substitution resulted in lower thermal stability. Further modification of the polymers was demonstrated by the reaction of 1P and 2P with phenylethynyldimethylsilane in the presence of a Pt catalyst.

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“…Combining the two commercially available reagents chlorodiphenylsilane [75,76]. When rhodium is used with ( S, S)-ethylferrotane [77] as a ligand, this cyclization sets the stereogenic center in 89 with good to excellent enantioselectivity [78].…”

Section: Asymmetric Intramolecular Hydrosilylationmentioning

confidence: 99%

Bioactive Amino Acids, Peptides and Peptidomimetics Containing Silicon

Sieburth

2014

Advances in Silicon Science

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4-Silalactones and 4-silalactams

Cited by 7 publications

References 0 publications

Perfluorocyclobutane Aromatic Polyethers. Synthesis and Characterization of New Siloxane-Containing Fluoropolymers

Perfluorocyclobutane Aromatic Polyethers. Synthesis and Characterization of New Siloxane-Containing Fluoropolymers

Hyperbranched polymers from propargyloxysilanes: New types of acetylenic resins

Bioactive Amino Acids, Peptides and Peptidomimetics Containing Silicon

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