摘要:
The present invention generally relates to processes for converting acrylate esters or a derivative thereof to difluoropropionic acid or a derivative thereof. This process is generally performed using fluorine gas in a hydrofluorocarbon solvent.
摘要:
A method of producing an acid halide, including: reacting a compound represented by the following Formula (III) with a basic compound and a compound represented by the following Formula (IV) to obtain a compound represented by the following Formula (II); and reacting the compound represented by Formula (II) with an acid halogenating agent to obtain a compound represented by the following Formula (I):
摘要:
The invention relates to a novel process for the preparation of certain cyclopropyl carboxylic acid esters and other cyclopropyl carboxylic acid derivatives; a novel process for the preparation of dimethylsulfoxonium methylide and dimethylsulfonium methylide; to the use of certain cyclopropyl carboxylic acid esters in a process for the preparation of intermediates that can be used in the synthesis of pharmaceutically active entities; and to certain intermediates provided by these processes.
摘要:
A polyfluoroalkane carboxylic acid represented by the following general formula: CnF2n+1(CH2CF2)m(CF2CF2)l−1CF2COOM (M: an alkali metal, a NH4 group or H; n: an integer of 1 to 6; m: an integer of 1 to 4; and l: 1 or 2) can be produced by hydrolysis reaction of polyfluoroalkane carboxylic acid fluoride represented by the following general formula: CnF2n+1(CH2CF2)m(CF2CF2)l−1CF2COF , where its carboxylic acid salt can be formed as an alkali metal salt, or a NH4 salt. The polyfluoroalkane carboxylic acid (or its salt) can act as a surfactant having distinguished monomer emulsificability and latex stability when used as an emulsifying agent or as a dispersing agent for polymerization reaction of fluorine-containing monomers, or as an effective surfactant capable of enhancing the micelles solubility of fluorine-containing monomers such as vinylidene fluoride, etc., when used as an emulsifying agent or a dispersing agent for homopolymerization or copolymerization reaction of vinylidene fluoride.
摘要:
The invention relates to a novel process for the preparation of certain cyclopropyl carboxylic acid esters and other cyclopropyl carboxylic acid derivatives; a novel process for the preparation of dimethylsulfoxonium methylide and dimethylsulfonium methylide; to the use of certain cyclopropyl carboxylic acid esters in a process for the preparation of intermediates that can be used in the synthesis of pharmaceutically active entities; and to certain intermediates provided by these processes.
摘要:
A process for preparing acylfluorides by reaction of carbonyl fluoride COF2 with compounds having general formula: T=CR1R2 (I) wherein: T is O or CF2 R1 and R2, equal or different, are F or a R(O)t radical, wherein R=linear or branched C1-C7 (per)fluoroalkyl, optionally containing one or more oxygen atoms, t is an integer equal to zero or 1; wherein a catalyst supported on porous compound is used, the catalyst being selected from: CsF, RbF, KF, AgF, each optionally in admixture with one or more of the others.
摘要翻译:通过羰基氟化物COF 2与通式为T = CR 1 R 2(I)的化合物反应来制备酰氟的方法其中:T为O或CF 2 R 1和R 2等同或不同,为F或R(O)t基团,其中 R =任选含有一个或多个氧原子的直链或支链C 1 -C 7(全)氟代烷基,t是等于0或1的整数; 其中使用负载在多孔化合物上的催化剂,所述催化剂选自:CsF,RbF,KF,AgF,各自任选地与一种或多种其它物质混合。
摘要:
Fluorinated polymers for use per se or in a blend with compatible homopolymer or copolymer which is not fluorinated, for providing a low surface energy (anti-stick, non-wetting, low friction) surface which is stable on immersion in water, has a weight average molecular weight ranging from 10.sup.3 to 10.sup.6 and comprises backbone containing (a) methylene groups and (b) side chain bearing groups with side chain on each side chain bearing group having the formula --Q--(CF.sub.2).sub.q F wherein Q comprises alkylene moiety and wherein the fluoroalkyl group attached to Q is spaced by r atoms from the atom in the backbone to which Q is attached, wherein q ranges from 6 to 15, r ranges from 6 to 18, and the ratio of q to r ranges from 0.6:1 to 1.8:1. Preferred fluorinated polymers include semifluorinated block copolymers of modified isoprene and styrene and semifluorinated ionenes.
摘要:
A process for preparing compounds corresponding to the formula RCFXC(O)Cl, in which X is fluorine or chlorine and R is fluorine or a perfluorinated C1- C10-alkyl group, preferably chlorodifluoroacetyl chloride, by photochemical oxidation of R122 (CF.sub.2 ClCHCl.sub.2) and the preparation of trifluoroacetyl chloride by photochemical oxidation of R123 (CF.sub.3 CHCl.sub.2) with oxygen under irradiation. The reaction is preferably carried out without pressurization and without addition of elemental chlorine.
摘要:
Novel 3,4,4-trifluorobutenoic acid derivatives of the formula ##STR1## wherein Q is --(C.dbd.W)--R.sub.2 wherein W is O or S, and R.sub.2 is an aliphatic or aromatic group when W.dbd.O; --OR.sub.50 ; --SR.sub.50 ; or --NR.sub.50 R.sub.60 wherein R.sub.60 is hydrogen or R.sub.50 ; NR.sub.7 R.sub.8 ; a heterocyclic group; phenyl substituted by alkyl; or any agronomically acceptable salt thereof having usefulness as nematocides, insecticides and acaricides.
摘要:
The present compound is a novel perfluoropolyether represented by the following general formula: ##STR1## wherein m is an integer of 1 to 3 and n is an integer of 2 to 6. This compound is quite useful as an inert liquid used as a heat transfer mediums in the filed of electronic materials.