16844-98-7Relevant academic research and scientific papers
Production of acyloxysilane
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Paragraph 0059-0064, (2021/10/30)
[A] a method for producing functional chemicals useful as efficient acyloxysilane. The silanol Si-to-OH bond [a], in the presence of a catalyst, comprising the step of reacting a carboxylic acid anhydride, Si-to-OCO bond (OCO is, oxycarbonyl groups (=O) O-a C shown. ) Having an acyloxysilane manufacturing method, wherein the catalyst, or (2) (1) production of acid catalyst selected from the next acyloxysilane. (1) 3 - 15 Of the periodic table of the first group the first group element selected from the perchlorate salt, trifluoromethanesulfonic acid salt, a bis (trifluoromethanesulfonyl imide) salt, lithium hexafluorophosphate salt, chloride, or bromide; inorganic acids; or an organic acid. (2) Inorganic or organic solid acid compounds[Drawing] no
Method for Producing Acyloxysilanes, Acyloxysilanes Obtained Thereby, and Use of Same
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Paragraph 0131, (2018/03/25)
An object of the invention is to provide a method for efficiently producing an acyloxysilane which is useful as a functional chemical, an acyloxysilane obtained thereby, and the use thereof. The present invention provides: a method for producing an acyloxysilane, including a reaction step of reacting an alkoxysilane with a carboxylic anhydride in the presence of a catalyst, wherein the alkoxysilane is a specified alkoxysilane represented by General Formula (I), the carboxylic anhydride is a specified carboxylic acid represented by General Formula (IIA) or (IIB), the catalyst is an acid catalyst, and an acyloxysilane obtained in the reaction step is a specified acyloxysilane represented by General Formula (IIIA) or (IIIB); and the use of the acyloxysilane as a surface treatment agent or the like.
Bimetallic reductive elimination from dinuclear Pd(III) complexes
Powers, David C.,Benitez, Diego,Tkatchouk, Ekaterina,Goddard, William A.,Ritter, Tobias
supporting information; experimental part, p. 14092 - 14103 (2011/01/09)
In 2009, we reported C-halogen reductive elimination reactions from dinuclear Pd(III) complexes and implicated dinuclear intermediates in Pd(OAc)2-catalyzed C-H oxidation chemistry. Herein, we report results of a thorough experimental and theor
One-pot synthesis of 3-hydroxymaleic anhydrides by cyclization of 1,1-bis(trimethylsilyloxy)ketene acetals with oxalyl chloride
Rotzoll, Sven,Ullah, Ehsan,G?rls, Helmar,Fischer, Christine,Langer, Peter
, p. 2647 - 2656 (2007/10/03)
Functionalized 3-hydroxymaleic anhydrides were prepared by cyclization of 1,1-bis(trimethylsilyloxy)ketene acetals with oxalyl chloride.
A study on the haterogeneous reaction of trialkylsilyl chlorides with inorganic salts and monocarboxylates catalysed by PEG400
Du, Yun-Fei,Cao, Yu-Qing,Dai, Zhi,Chen, Bao-Hua
, p. 223 - 225 (2007/10/03)
The important and useful trialkylsilyl pseudohalides R3SiX, where X=NCS, NCO, N3 or CN and R=methyl or ethyl, and trimethylsilyl monocarboxylates, where X=RCOO, were readily prepared in high yields by nucleophilic substitution of R3SiCl with X ions provided by NaX or KX at room temperature catalysed by PEG400 and zinc iodide. The reactions of trimethylsilyl chloride with some metal oxysalts were also studied for the first time.
Diiodosilane. 3. Direct Synthesis of Acyl Iodides from Carboxylic Acids, Esters, Lactones, Acyl Chlorides, and Anhydrides
Keinan, E.,Sahai, M.
, p. 3922 - 3926 (2007/10/02)
Diiodosilane (SiH2I2, DIS) is a very useful reagent for direct, high yield synthesis of acyl iodides from variety of carboxylic acid derivatives, such as carboxylic acids, esters, lactones, anhydrides, and acyl chlorides.These transformations are remarkably accelerated by iodine.In the absence of iodine DIS reacts with carboxylic acids and esters, much as does iodotrimethylsilane (TMSI), to form the corresponding silyl carboxylates.However, in contrast to TMSI, DIS and iodine react further with silyl carboxylates to produce acyl iodides.This reaction, when followed by addition of an appropriate alcohol, represents an esterification and transesterification method that is useful even for sterically hindered and/or poorly nucleophilic alcohols.Lactones react with DIS to produce either silyl ω-iodo carboxylates or ω-iodoacyl iodides, depending on the reaction conditions.The reaction between DIS and 1 equiv of a carboxylic anhydride affords, in the presence of iodine, 2 equiv of acyl iodide.
Reactions of Trialkylsilyl Trifluoromethanesulfonates, VIII. - Synthesis of O-(Trimethylsilyl)ketene O,N-Acetals, 2,5-Bis(trimethylsiloxy)pyrroles, -furans, and -thiophenes
Frick, Ulrich,Simchen, Gerhard
, p. 839 - 846 (2007/10/02)
Ketene O,N-acetals 3, 4, 6, 8 are obtained from N,N-diarylcarboxamides and N-acetylheterocycles 5, 7 by silylation with trimethylsilyl triflate (2) in the presence of triethylamine.Analogous reactions of carboxamides 9 and N-acyllactams 11 yield the keten
EQUILIBRIA BETWEEN MexSiCl4-x, x = 3,2,1,0 AND ALKYL CARBOXYLATE ESTERS
Mbah, Godfrey C.,Speier, John L.
, p. 77 - 82 (2007/10/02)
At 150 deg C equilibria are established between chlorosilanes and alkyl esters according to the equation: MexSiCl4-x + RCOOR' MexSi(O0.5)y(OOCR)z-yCl4-x-y-z + yRCOCl + zR'Cl.When x = 3, y = 0, z = 0.56; when x = 2, y = 0.26, z = 0.98.When x = 1, y = z = 0.56; when x = 0, y = z = 0.53.Lewis acid salts such as ZnCl2 or FeCl3 are effective catalysts for the reactions leading to mixtures of these compounds.
Reagents and synthetic methods. 31. Silylations with N-trimethylsilyl-2-oxazolidinone (TMSO)
Aizpurua, Jesus M.,Palomo, Claudio,Palomo, Antonio L.
, p. 336 - 340 (2007/10/02)
Silylation of ketones, alcohols, mercaptans, and carboxylic acids with N-trimethylsilyl-2-oxazolidinone (TMSO) and triflic acid as catalyst has been described from synthetic and mechanistic points of view.
