摘要:
The present invention provides a process for producing a fluoroalkyl iodide represented by the general formula (II): Rf—CH2CH2I (II) wherein Rf is a perfluoroalkyl or polyfluoroalkyl group comprising 1 to 20 carbons, the process comprising reacting hydrogen iodide gas with a fluoroalkene in the presence of a catalyst. The present invention also provides a process for producing a fluoroester by reacting the fluoroalkyl iodide with a carboxylate.
摘要:
A fluorine-containing cyclic compound is represented by the formula 1: wherein each of R1, R2 and R3 independently represents a hydrogen, alkyl group, fluorine, fluoroalkyl group or hexafluorocarbinol group, wherein at least one of the hexafluorocarbinol groups may partly or totally be protected with a protecting group, and wherein the protecting group is (a) a straight-chain, branched or cyclic hydrocarbon group having a carbon atom number of 1-25 or (b) an aromatic hydrocarbon group and optionally contains a fluorine atom, oxygen atom, nitrogen atom or carbonyl bond.
摘要:
Novel mixtures of perfluoroalkyl halides and derivatives thereof are described. These mixtures contain some compounds with a straight perfluoroalkyl group and some with a branched perfluoroalkyl group. Methods of preparation and use are also described.
摘要:
This invention relates to carbon based initiators for polymerization and telomerization reactions. Polymers produced are useful as water repellants and materials with high temperature resistance. Telomers are useful as intermediates in the production of chemically inert and temperature resistant materials.
摘要:
Process for the manufacture of .alpha.-fluoroacrylates of general formula: ##STR1## with R' alkyl, aryl or cycloalkyl, according to which source of formalin, consisting of paraformaldehyde is reacted with an .alpha.-fluorophosphonoacetate in aqueous medium in the presence of a salt of a weak inorganic acid.
摘要:
Highly fluorinated aryloxyfluoroether esters, acids and alcohols, which are intermediates in the production of vinyl monomers, are provided. Also provided is a process for making aryloxyfluoroether esters by the base catalyzed addition of hydroxyaromatic compounds to perfluorovinylether esters.
摘要:
Process for the preparation of .alpha.-fluoroacrylic acid derivatives from 2,2-difluoro-1-methyl-cyclopropyl compounds and new 1,1-difluoro-2-halogenoethyl (halogeno)methyl ketones obtainable in this process as intermediates.
摘要:
A dental preparation is disclosed which comprises a (meth-)acrylate ester of the general formula whereinR.sup.1 is the same or different and represents a hydrogen or fluorine groupR.sup.2 is the same or different and represents a hydrogen or methyl group,a has a value of 0, 1, 2, 3 or 4,b has an average value of 2 to 30,n has an average value of 4 to 12 andm has an average value of 3 to 14.The preparation is, for example, suitable as relining material for dental prostheses.
摘要:
A process for the preparation of fluoroalkyl (alk)acrylates, having the formula: ##STR1## where R.sub.1 is a hydrogen atom, or an alkyl group having up to 4 carbon atoms,n is between 1 and 20, andm is between 0 and n,in which an (alk)acrylic anhydride, of the formula: ##STR2## is reacted with a fluoroalcohol of the formula:C.sub.n F.sub.2n+1-m H.sub.m -CH.sub.2 OHin the presence of at least one acid catalyst, at a temperature between 10.degree. C. and 90.degree. C. and during 3 to 120 minutes.
摘要翻译:一种制备具有下式的氟代烷基(alk)丙烯酸酯的方法,其中R1是氢原子或具有至多4个碳原子的烷基,n在1和20之间,m在0和 n,其中在至少一种酸催化剂的存在下,在10℃的温度下使下式的(alk)丙烯酸酐与下式的氟代醇反应:C n F 2n + 1-m H m -CH 2 OH C.和90℃,3至120分钟。
摘要:
Perdeuterated methacrylates of a high degree of deuteration can be obtained by a process for the preparation of perdeuterated methacrylates from hexadeuteroacetone by conversion into the corresponding cyanohydrin, subsequent elimination of water, hydrolysis of the cyano group and esterification with perdeuterated alkanols, the conversion of hexadeuteroacetone into the cyanohydrin being effected by reaction with trimethylsilyl cyanide to give 1,3-hexadeutero-2-(trimethylsiloxy)-2-cyano-propane and subsequent hydrolytic elimination of the trimethylsilyl group.