Mitsubishi Gas Chemical Company, Inc.

Toshio Kondo

Tetsuo Aoyama

Takako Uchiyama

Masaharu Doya

Hideo Igarashi

Hideki Fukuda

Shuji Ebata

Hirofumi Higuchi

Koichi Kida

Yutaka Tamura

Hiroyuki Hirayama

Mayumi Takahashi

Masahiro Miyake

Takahiro Kato

Go Nakamura

Yasushi Sugawara

There is provided a novel method for producing an optically active (4R)-1,3-thiazolidine-4-carboxylic acid by allowing cells of a microorganism or a preparation obtained from cells of a microorganism having activity for stereoselectively hydrolyzing an optically active (4R)-1,3-thiazolidine-4-carboxylic acid amide to act on a mixture of (4R)- and (4S)-enantiomers of a 1,3-thiazolidine-4-carboxylic acid amide to produce the optically active (4R)-1,3-thiazolidine-4-carboxylic acid and separating the optically active (4R)-1,3-thiazolidine-4-carboxylic acid.

Process for producing optically active (4R)-1,3-tiazolidine-4-carboxylic acid

The present invention-provides a method for preparing a high-purity aqueous quaternary ammonium hydroxide solution, and there is here disclosed this method for preparing the high-purity aqueous quaternary ammonium hydroxide solution which comprises reacting a quaternary ammonium organic acid salt with hydrogen peroxide, oxygen or an oxygen-containing gas in the presence of a platinum group metal catalyst to produce a quaternary ammonium inorganic acid salt, and then electrolyzing this inorganic acid salt by the use of an electrolytic tank having a cation exchange membrane.

Method for preparing aqueous quaternary ammonium hydroxide solution

A surface treating agent for an aluminum line pattern substrate is disclosed, comprising an aqueous solution containing 0.01 to 15% by weight of quaternary ammonium hydroxide represented by the general formula: ##STR1## wherein R is an alkyl group having 1 to 3 carbon atoms, or a hydroxy-substituted alkyl group having 1 to 3 carbon atoms, and R.sup.1, R.sup.2 and R.sup.3 are independently an alkyl group having 1 to 3 carbon atoms, and 0.1 to 20% by weight of sugar or sugar alcohol. This agent can inhibit the after-corrosion of aluminum effectively.

Surface treating agent for aluminum line pattern substrate

Disclosed is a process for producing .alpha.-hydroxy-carboxylic acid amide represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification, by a catalytic hydration reaction of cyanohydrin represented by the formula (II): ##STR2## which comprises using a modified manganese dioxide containing one or more of an alkali metal element and an alkaline earth element in an amount of 0.05 to 0.5 based on the manganese element in terms of atomic ratio.

Process for producing alpha-hydroxycarboxylic acid amide

A process for optically isomerizing an optically active alpha-amino acid amide comprising heating a D-alpha-amino acid amide or an L-alpha-amino acid amide in the presence of a strongly basic compound; and a process for producing an L-alpha-amino acid, which comprises

Process for recimization of an optically active alpha-amino acid amides

An .alpha.-amino acid is effectively separated and recovered from an aqueous solution containing at least an .alpha.-amino acid and its corresponding .alpha.-amino acid amide by performing ion-exchange electrodialysis in the presence of ammonia. A reaction product liquid obtained by biochemical asymmetric hydrolysis of a D, L-.alpha.-amino acid is used preferably as the raw material aqueous solution for dialysis.

Growing community of inventors

Niigata, Japan

Toshio Kondo