Daikin Industries, Ltd.

Akihiro Gotou

Yosuke Kishikawa

Sumi Ishihara

Tatsuya Ohtsuka

Manaho Miyazaki

Yuzo Komatsu

Masahiro Higashi

Naoyuki Hoshiya

Akinori Yamamoto

Yoshihiro Yamamoto

Yoshichika Kuroki

Makoto Matsuura

Takashi Namikawa

Yousuke Kishikawa

Takahiro Furutani

Masaki Irie

Asako Yoshiyama

Tomohito Hamada

A fluorine-containing elastomer including a vinylidene fluoride unit and an unsaturated ether unit selected from a unit based on a monomer (1) represented by the general formula (1): CH═CFCF—O—Rfand a unit based on a monomer (2) represented by the general formula (2): CH═CF—O—Rf, and having a glass transition temperature of 20° C. or lower, a crosslinkable composition including the fluorine-containing elastomer, and a molded article obtained from the fluorine-containing elastomer or the crosslinkable composition.

Fluorine-containing elastomer, crosslinkable composition and molded article

An object of the present invention is to provide, for example, a novel method for synthesizing a fluorovinyl ether compound from a fluorine-containing vinyl compound. This problem is solved by a method for producing a compound represented by formula (1): whereinRis a hydrogen atom, a halogeno group, an alkyl group, a fluoroalkyl group, or an aromatic group optionally having one or more substituents,Rf is a fluoro group or a perfluoroalkyl group,Ris a hydrogen atom, a halogeno group, an alkyl group, a fluoroalkyl group, or an aromatic group optionally having one or more substituents, or(i) Rand R, (ii) Rand Rf, or (iii) Rf and Rmay be linked to each other,Ris R,Ris a hydrogen atom or R,Ris a hydrogen atom or R, ortwo or three of R, R, and R, taken together with the adjacent carbon atom, may form a ring optionally having one or more substituents, andR, in each occurrence, is the same or different and represents a hydrocarbon group optionally having one or more substituents, the method comprisingstep A of reacting a compound represented by formula (2): whereinRis a leaving group, andother symbols are as defined above,with a compound represented by formula (3): wherein the symbols in the formula are as defined above,in the presence of a transition metal catalyst.

Fluorovinyl ether compound

A method for synthesizing a fluorovinyl ether compound from a fluorine-containing vinyl compound. Specifically, a method for producing a compound represented by formula (1), comprising step A of reacting a compound represented by formula (2) with a compound represented by formula (3) in the presence of a transition metal catalyst:   wherein the substituents are defined in the disclosure.

Method for producing fluorovinyl ether compound

An object of the present invention is to provide a novel method for producing an &#x3b1;-fluoroacrylic acid ester compound. This problem is solved by a method for producing a compound represented by formula (1), wherein Rand Rare identical or different, and each represents an alkyl group or the like; and Ris an alkyl group or the like, the method comprising step A of reacting a compound represented by formula (2) with R&#x2014;OH (3) and carbon monoxide in the presence of palladium, a double bond-containing compound (&#x3b1;), a diphosphine compound (&#x3b2;), and a base, to obtain the compound represented by formula (1) above.

Method for producing alpha-fluoroacrylic acid

An object of the present invention is to provide a method for stabilizing an acrylic acid derivative, and a composition containing an acrylic acid derivative in which the acrylic acid derivative is stabilized. The present invention provides a composition comprising: (A) an acrylic acid derivative represented by Formula (I): (wherein Rrepresents alkyl, fluoroalkyl, aryl that may have one or more substituents, or hydrogen; and X represents fluorine, alkyl, perfluoroalkyl, or hydrogen); and (B) aldehyde, wherein the content of acrylic acid derivative (A) is 30% (w/w) or more.

Composition

An object of the present invention is to provide a process for producing &#x3b1;-fluoroacrylic acid esters at a high starting material conversion and a high yield. The present invention provides, as a means to achieve the object, a process for producing a compound represented by formula (1): wherein Rand Rare the same or different and each represent alkyl, fluoroalkyl, aryl optionally substituted with at least one substituent, halogen, or hydrogen; and Rrepresents alkyl, fluoroalkyl, or aryl optionally substituted with at least one substituent, the process comprising step A of reacting a compound represented by formula (2): wherein the symbols are as defined above, with carbon monoxide and an alcohol represented by formula (3):R&#x2014;OH&#x2003;&#x2003;(3)wherein the symbol is as defined above, in the presence of a transition metal complex catalyst containing at least one bidentate phosphine ligand and a base to thereby obtain the compound represented by formula (1).

Production method for alpha-fluoro acrylic acid esters

The object of the present invention is to provide a process for producing &#x3b1;-fluoroacrylic acid ester at a high starting material conversion, high selectivity, and high yield. The present invention provides a process for producing the compound represented by the formula (1) wherein R represents alkyl optionally substituted with one or more fluorine atoms, the process comprising step A of reacting a compound represented by the formula (2) wherein X represents a bromine atom or a chlorine atom with an alcohol represented by the formula (3) wherein the symbol is as defined above, and carbon monoxide in the presence of a transition metal catalyst and a base to thereby obtain the compound represented by the formula (1). 

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Osaka, Japan

Akihiro Gotou