Silanes esters

SYNS DIETHYL (2-(METHYLDIETHOXYSILYL)-ETHYL)PHOSPHONATE PHOSPHONIC ACID, (2-(DIETHOXYMETHYLSILYL)ETHYL)-, DIETHYL ESTER SILANE 40-43... 

SYNS I 7840 Y-ISOCYANATOPROPYLTRIETHOXY-SILANE ISOCYANIC ACID, 3-(TRIETHOXYSILYL)-PROPYL ESTER SILANE, TRIETHOXY(3-ISOCY-ANATOPROPYL)- TRIETHOXY(3-ISOCYANATO-PROPYL)SILANE Y9030 D YH9030... 

Beilstein Handbook Reference) AI3-15098 BRN 1422225 Dynasil A EINECS 201-083-8 ES 100 ES 28 Ethyl orthosilicate Ethyl silicate Ethyl silicate, ((EtO)4Si) Etylu krzemian HSDB 534 NSC 4790 Orthosilicic acid, tetraethyl ester Silane, tetraethoxy- Silester Silicate d ethyle Silicate tetraethylique Silicic acid, tetraethyl ester Silicic acid H4Si04), tetraethyl ester Silicon ethoxide Silicon tetraethoxide Silikan L TEOS Tetraethoxysilane ... 

CAS 2530-85-0 EINECS/ELINCS 219-785-8 Synonyms (3-Hydroxypropyl)trimethoxysilane methacrylate Methacrylic acid, 3-(trimethoxysilyl) propyl ester y-Methacryloxypropyltrimethoxy-silane (3-Methacryloyloxypropyl) trimethoxysilane 2-Methyl-2-propenoic acid-3-(trimethoxysilyl) propyl ester 2-Propenoic acid, 2-methyl-, 3-(trimethoxysilyl) propyl ester Silane, (3-hydroxypropyl) trimethoxy-, methacrylate 3-(Trimethoxysilyl)-1-propanol methacrylate 3-(Trimethoxysilyl) propyl ester methacrylic acid 3-(Trimethox ilyl) propyl methacrylate Classification Methacrylate silane Empirical CioHioOsSI Formula CH2 CCH,COO(CH2),Si(OCH,),... 

Xu Xu, G., Gong, M., Shi, W.-F. Effects of hyperbranched poly (ester-silane) as a coupling agent on the mechanical behavior of glass bead filled epoxy resin. Polym. Adv. Technol. 16 (2005) 473 79. 

Keto ester Silane Yield Optical yield (%)... 

Additives used in final products Fillers antimony trioxide, aramid, barium sulfate, boron nitride, calcinated kaolin, carbon black, carbon fiber, glass fiber, glass spheres, mica, montmorillonite, talc, titanium dioxide, zinc borate Antistatics antimony-doped tin oxide, carbon nanotubes, polyaniline, polyisonaphthalene Antiblocking calcium carbonate, diatomaceous earth, silicone fluid, spherical silicone resin, synthetic silica Release calcium stearate, fluorine compounds, glycerol bistearate, pentaerythritol ester, silane modified silica, zinc stearate Slip spherical silica, silicone oil ... 

Antiblocking calcium carbonate, diatomaceous earth, silicone fluid, spherical silicone resin, synthetic silica Release calcium stearate, fluorine compounds, glycerol bistearate, pentaerythritol ester, silane modified silica, zinc stearate Slip spherical silica, silicone oil... 

Various methacrylate esters have been disclosed as modifiers of DADC. Thus methyl methacrylate polymer may be dissolved in DADC and the sheets cast (22). When DADC is copolymerized with methyl methacrylate, a silane derivative may be added to control the release from the mold (23). 

The properties and applications of commercially important hydride functional silanes, ie, compounds having a Si—H bond halosilanes, ie, compounds having a Si—X bond and organosilanes, ie, compounds having a Si—C bond, are discussed hereia. Compounds having Si—OSi bonds are called sdoxanes or sihcones. Those having a Si—OR bond are called siUcon esters. Sdoxanes and siUcon esters are discussed elsewhere ia the Eniyclopedia (see Silicon COMPOUNDS, SILICON ESTERS SILICON COMPOUNDS, SILICONES). 

The physical properties of commercial alkoxysilanes are provided in Table 1. Two classes of silane esters have very distinct properties and are generally considered apart from alkoxysilanes. Sdatranes are compounds derived from trialkanolamines and have siHcon—nitrogen coordination. These are generally hydrolytically stable and have unique physiological properties (3). A second special class of monomeric esters are cycHc diesters of polyethyleneoxide glycols designated sila-crowns, which have appHcation as catalysts (4). Neither silatranes nor sila-crowns are considered herein. 

The partially alkoxylated chlorotitanates, (RO) TiCl, can be prepared in high purity by reaction of TiCl with an organosilane ester, Si(OR)4 (see Silicon compounds). The degree of esterification of the titanium can be controlled by the amount of silane ester used. When is 3 or 4, the addition of the appropriate alcohol and an amine receptor is required (5). 

Allyl(trimethyl)silanes react efficiently with Lewis acids to give the corresponding tertiary alcohols67. Although only modest diastereofacial selectivity was observed for reaction with menthyl esters67, improved selectivity was found for chiral a-oxo imides68 and a-oxo amides derived from proline69. 

Very few optically active cyanohydrins, derived from ketones, are described in the literature. High diastcrcosclectivity is observed for the substrate-controlled addition of hydrocyanic acid to 17-oxosteroids27 and for the addition of trimethyl(2-propenyl)silane to optically active acyl cyanides28. The enantioselective hydrolysis of racemic ketone cyanohydrin esters with yeast cells of Pichia miso occurs with only moderate chemical yields20. 

Tertiary aliphatic alcohols Methyl esters of carboxylic acids Esters of n-chain carboxylic acids Silanes... 

While there is clear evidence for complex formation between certain electron donor and electron acceptor monomers, the evidence for participation of such complexes in copolymerization is often less compelling. One of the most studied systems is S-.V1 Al I copolymerization/8 75 However, the models have been applied to many copolymerizations of donor-acceptor pairs. Acceptor monomers have substituents such as carboxy, anhydride, ester, amide, imide or nitrile on the double bond. Donor monomers have substituents such as alkyl, vinyl, aryl, ether, sulfide and silane. A partial list of donor and acceptor monomers is provided in Table 7.6.65.-... 

Selenium oxide (SeO,) [7446-08-4], 25 Silane, tnchloro [ 10025-78-2], 83 Sodium azide [26628-22-8], 109 Sodium hydride [7646-69-7], 20 Stannane, tetrachloro- [7646-78-8], 97 Sulfuric acid, diethyl ester [64-67-5], 48 dimethyl ester [77-78-1], 62 Sulfuryl chloride isocyanate [1189-71-5], 41... 

The structurally simplest silicon reagent that has been used to reduce sulphoxides is the carbene analog, dimethylsilylene (Me2Si )29. This molecule was used as a mechanistic probe and did not appear to be useful synthetically. Other silanes that have been used to reduce sulphoxides include iodotrimethylsilane, which is selective but unstable, and chlorotrimethylsilane in the presence of sodium iodide, which is easy to use, but is unselective since it cleaves esters, lactones and ethers it also converts alcohols into iodides. To circumvent these complications, Olah30 has developed the use of methyltrichlorosilane, again in the presence of sodium iodide, in dry acetonitrile (equation 8). A standard range of sulphoxides was reduced under mild conditions, with yields between 80 and 95% and with a simple workup process. The mechanism for the reaction is probably very similar to that given in equation (6), if the tricoordinate boron atoms in this reaction scheme are replaced... 

Ester-Gruppen werden durch Trichlor-silan nicht angegriffen, so daB diese Methode zur selektiven Reduktion der Carboxy-Gruppe geeignet ist. Terepthalsaure-monoathylester wird z. B. iiber Trichlor-(4-athoxycarbonyl-benzyl)-silicium zu 4-Methyl-benzoesaure-dthylester reduziert3 ... 

---