Takasago International Corporation

Miharu Ogura

Kenya Ishida

Kazutoshi Sakurai

Takeshi Yamamoto

Hiroyuki Matsuda

Akira Amano

Tetsuro Yamasaki

Yoshifumi Yuasa

Kenichiro Shiroyama

Makoto Emura

Akemi Shimada

Yoshihiro Yaguchi

Toshihiro Takeda

Shigeyuki Sasaki

Hideyuki Ohta

The present invention relates to a flavor composition or fragrance composition which can satisfy diversified requirements for flavored products, as well as to a flavor-improving agent which can improve the quality and release of aroma of a beverage or food. More particularly, the present invention relates to a flavor composition or fragrance composition which comprises an optically active S-alkyl 2-methylbutanethioate as an active ingredient, a flavor- or fragrance-added product, a flavor-improving agent which comprises an optically active S-alkyl 2-methylbutanethioate as an active ingredient, and a beverage or food having an improved flavor. The optically active S-alkyl 2-methylbutanethioate includes S-alkyl(R)-2-methylbutanethioate and S-alkyl(S)-2-methylbutanethioate.

Flavor composition or fragrance composition

Keratin fiber strengthening agent and method for strengthening keratin fiber

An optically active (2S,3R)-2-(3'-hydroxyacyl)aminoalkane-1,3-diol and a process for producing the same are disclosed. The compound is represented by the following general formula (1): ##STR1## wherein R.sup.1 represents a linear or branched, saturated aliphatic hydrocarbon group having 9 to 19 carbon atoms; R.sup.2 represents a linear or branched, saturated aliphatic hydrocarbon group having 1 to 19 carbon atoms; and symbol * means that the carbon atom is an asymmetric carbon atom of the S or R configuration. The optically active compound is a ceramide in which the fatty acid moiety has an optically active hydroxyl group in the 3-position.

Optically active compound and process for producing the same

A repellent agent containing a 3-substituted p-menthane (or p-menthene) derivative represented by the following formula (1) is disclosed: ##STR1## In the formula, R is a hydroxy group or hydroxyethyl group; R.sub.2 is a hydrogen atom, hydroxy group, hydroxymethyl group, or alkoxy group having 1 to 3 carbon atoms; the double line is a double bond or a single bond, wherein R.sub.1 is absent when the double line is a double bond, and R.sub.1 is a hydrogen atom or hydroxy group when the double line is a single bond; provided that, when the double line is a single bond and R.sub.2 is a hydrogen atom, both of R and R.sub.1 are not a hydroxy group at the same time; and X is CH.sub.2 when the double line is a double bond and is CH.sub.3 when the double line is a single bond.

Repellent agent against harmful insects and perfume composition

A method of selective N-acylation of an aminodiol having a primary alcoholic hydroxyl group and a secondary alcoholic hydroxyl group, in which the objective product can be prepared in high yield and without troublesome extraction and purification operations. More particularly, a method of making a primary amide derivative represented by the following general formula (3) is disclosed: ##STR1## wherein R.sup.1 represents a linear saturated aliphatic hydrocarbon group having 11 to 19 carbon atoms, R.sup.2 represents a linear saturated or unsaturated aliphatic hydrocarbon group having 9 to 19 carbon atoms which may have a hydroxyl group at the 1-position, which includes the steps of reacting an aminodiol represented by the following general formula (1): ##STR2## wherein R.sup.1 is the same as R.sup.1 in general formula (3) with a fatty acid alkyl ester represented by the following general formula (2):

Method of making primary amide derivative

Ethyl (1R,6S)-2,2,6-trimethylcyclohexanecarboxylate represented by formula (1) ##STR1## is disclosed. Also, an aroma chemical composition containing the same and a process of the production of the same are disclosed.

Ethyl (1R,6S)-2,2,6-trimethylcyclohexanecarboxylate, aroma chemical

Growing community of inventors

Kanagawa, Japan

Miharu Ogura