Daikin Industries, Ltd.

Tatsuya Ohtsuka

Yoshichika Kuroki

Yosuke Kishikawa

Yoshihiro Yamamoto

Sumi Ishihara

Atsushi Shirai

Akihiro Gotou

Moe Hosokawa

Yuzo Komatsu

Hiroyuki Arima

Atsushi Suzuki

Akinori Yamamoto

Yuuki Suzuki

Akinari Sugiyama

Shingo Nakamura

Takashi Namikawa

Yuusuke Etou

Manaho Miyazaki

Kanako Fukumoto

Yousuke Kishikawa

Akiyoshi Yamauchi

Daisuke Karube

Shigeaki Yamazaki

Kenzou Takahashi

Masahiro Higashi

Takaya Yamada

Yoshiko Kuwajima

Masatoshi Nose

Tomoya Hidaka

Hisako Nakamura

Masakazu Kinoshita

Yoshio Amimoto

Kotaro Hayashi

Masaru Hirai

Sueyoshi Ishikawa

Masato Naitou

Atsushi Maruo

Toshiharu Shimooka

Kazuyoshi Ichihara

Toshiya Mantani

An object of this invention is to provide a simple method for producing sulfur tetrafluoride. The object is achieved by a method for producing sulfur tetrafluoride, comprising step A of reacting a fluorinated halogen compound with sulfur chloride, the fluorinated halogen compound being represented by formula: XF, wherein X is chlorine, bromine, or iodine; and n is a natural number of 1 to 5.

Method for manufacturing sulfur tetrafluoride

The invention provides an electrolyte solution capable of providing an electrochemical device having low resistance and excellent high-temperature storage characteristics and cycle characteristics. The electrolyte solution contains lithium fluorosulfonate and a solvent containing a compound (1) represented by the following formula (1): CFHCOOCH.

Electrolytic solution, electrochemical device, lithium ion secondary battery, and module

A method for producing lithium fluorosulfonate which includes reacting XSOH, wherein X is a leaving group other than fluorine, with a lithium source and a fluorine source. Also disclosed is a composition containing XSOH.

Lithium fluorosulfonate production method

The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound, in particular, a simple method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound (I) containing at least one &#x2014;CF&#x2014; moiety, the method comprising step A of allowing IFand a disulfide compound (III) of the formula: R&#x2014;S&#x2014;S&#x2014;R(wherein R, in each occurrence, independently represents aryl optionally having at least one substituent or alkyl optionally having at least one substituent) to act on a carbonyl compound (II) containing at least one &#x2014;C(O)&#x2014; moiety.

Method for producing difluoromethylene compound

The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound containing a &#x2014;CF&#x2014; moiety, the method comprising step A of mixing:

Method for manufacturing difluoromethylene compound

Provided is a method for producing fluoromethane and 3,3,3-trifluoro-2-(trifluoromethyl)propanoyl fluoride ((CF)CHCOF), which are useful as dry etching gases etc., safely and inexpensively with high purity. According to the method in which 1,1,3,3,3-pentafluoro-2-trifluoromethylpropyl methyl ether is pyrolyzed in a gas phase in the presence of a catalyst, the desired fluoromethane and 3,3,3-trifluoro-2-(trifluoromethyl)propanoyl fluoride can be obtained with high selectivity and high conversion of the starting material by a simple process in which a pyrolysis reaction is performed in a gas phase using the inexpensive starting material.

Method for producing dry etching gas

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

An object of the present invention is to provide a method for producing methane fluoride that is useful, for example, as a dry etching gas, the method being more suitable for industrial production. To achieve this object, the present invention provides a method including reacting (A) dimethyl sulfate and (B) at least one fluorocompound in a liquid phase, the fluorocompound (B) being at least one compound selected from the group consisting of hydrogen fluoride and hydrofluoric acid salts, or a metal fluoride, wherein when the fluoride compound (B) includes hydrogen fluoride or a hydrofluoric acid salt, the reaction is carried out without a solvent or using a polar solvent as a solvent, and when the fluoride compound (B) is a metal fluoride, the reaction is carried out using water as a solvent.

Method for manufacturing methyl fluoride

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). 

Method for producing &#x3b1;-fluoroacrylic acid ester

An object of the present invention is to provide a production method that makes it possible to produce 1,1-dibromo-1-fluoroethane easily and sustainably. The present invention provides a method for producing 1,1-dibromo-1-fluoroethane, the method comprising step A of reacting 1,1-dibromoethylene with hydrogen fluoride to obtain 1,1-dibromo-1-fluoroethane.

Method for producing 1,1-dibromo-1-fluoroethane

The present invention provides a novel &#x3b1;-fluoromethoxycarboxylic ester represented by Formula (1): (CF)C(OCHF)COOR wherein R is a hydrocarbon group that may have a substituent; a process for producing 1,1,1,3,3,3-hexafluoroisopropyl fluoromethyl ether, the process including hydrolyzing and decarboxylating the &#x3b1;-fluoromethoxycarboxylic ester; and a process for producing an &#x3b1;-fluoromethoxycarboxylic ester represented by Formula (1): (CF)C (OCHF)COOR, the process including reacting an &#x3b1;-hydroxycarboxylic ester represented by Formula (2): (CF)C(OH)COOR with a halofluoromethane in the presence of an alkaline compound. According to the present invention, 1,1,1,3,3,3-hexafluoroisopropyl fluoromethyl ether (sevoflurane), which is known as an anesthetic compound, can be efficiently produced at low cost.

Alpha-fluoromethoxycarboxylic ester, process for producing the alpha-fluoromethoxycarboxylic ester, and process for producing sevoflurane

The present invention provides a process for producing a novel compound, i.e., &#x3b1;-chloromethoxycarboxylic acid ester represented by General Formula (1): (CF)C(OCHCl)COOR, wherein R is a hydrocarbon group which may be substituted with at least one atom selected from the group consisting of halogen, oxygen, nitrogen, and sulfur atoms, comprising reacting an &#x3b1;-methoxycarboxylic acid ester represented by General Formula (2): (CF)C(OCH)COOR, wherein R is as defined above, with molecular chlorine; and a process for producing 1,1,1,3,3,3-hexafluoroisopropyl fluoromethyl ether represented by a chemical formula (CF)CH(OCHF), comprising fluorinating and decarboxylating the &#x3b1;-chloromethoxycarboxylic acid ester. According to the present invention, 1,1,1,3,3,3-hexafluoroisopropyl fluoromethyl ether (sevoflurane), which is known as a compound having an anesthetic property, can be produced efficiently and at a low cost.

Carboxylic acid ester, use of the same, and method for producing the same

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Osaka, Japan

Tatsuya Ohtsuka