Central Glass Company, Limited

Yoshiki Hirotsu

Takeo Komata

Kei Matsunaga

Satoru Miyazawa

Shinya Akiba

Katsunori Kawamura

Nariaki Ii

A process for producing a fluorine-containing 2,4-diol represented by the formula [4], wherein Rrepresents a hydrogen atom or an acyclic or cyclic alkyl group having a carbon atom number of 1 to 7; Rrepresents an acyclic or cyclic alkyl group having a carbon atom number of 1 to 7; and Rand Rare optionally bonded to each other to form a ring, includes reducing a hydroxy ketone represented by the formula [3], wherein Rand Rare defined as above, by hydrogen in the presence of a ruthenium catalyst.

Processes for producing fluorine-containing 2,4-diols and their derivatives

A process for producing an &#x3b1;-substituted acrylic acid ester represented by the formula [1], wherein each of Rand Ris independently a hydrogen atom, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, or perfluoroethyl group, includes reacting an &#x3b1;-substituted acrylic acid anhydride represented by the formula [7], with 1,1-bis(trifluoromethyl)-1,3-diol represented by the formula [2].

Process for producing &#x3b1;-substituted acrylic acid esters

The invention relates to a process for purifying a crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate containing an impurity. The process includes bringing the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate into contact with a poor solvent in which 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate is substantially insoluble, thereby removing the impurity from the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate. Alternatively, the process includes precipitating crystals of 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate from a solution of the crude 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate. Thus, it is possible to produce 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate of high purity. This product makes it easy to produce 1,1,1,5,5,5-hexafluoroacetylacetone of high purity.

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Saitama, Japan

Yoshiki Hirotsu