Abstract: A method for producing an optically active 2,3-dihydrofarnesal of formula (1) is disclosed.

Abstract: A method for producing an optically active 2,3-dihydrofarnesal of formula (1) is disclosed.

Abstract: A method for producing an optically active 2,3-dihydrofarnesal of formula (1) is disclosed.

Abstract: The present invention provides a deodorant composition which specifically acts upon a malodor derived from sulfides and thereby can eliminate or alleviate the malodor. The present invention relates to a deodorant composition for sulfides, which comprises (A) a polyphenol or a polymer thereof and (B) sodium percarbonate or hydrogen peroxide.

Abstract: To provide a drug, quasi-drug, food or drink that can act as a gastric acid secretion suppressant or a potassium channel inhibitor by including a composition that can be safely used and can be inexpensively produced. Each of these products contains one or more cooling sensation compositions that are compounds providing cooling sensation in an amount sufficient for exhibiting the efficacy thereof in a living body to which the product is administered.

Abstract: The present invention is to provide a method for preparing easily and efficiently ?-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives in high optical purity by use of an easily available hydrolase, which are useful as intermediates for pharmaceuticals, agrochemicals and the like. More particularly, the present invention relates to a method for preparing ?-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives with an optical purity of substantially 100% ee, comprising reacting a ?-butyrolactone which is a mixture of optical isomers, with a nucleophilic agent in the presence of a hydrolase, provided that a lipase derived from porcine pancreas is excluded.

Abstract: The invention provides a chain diene compound with desirable regioselectivity, in the presence of a specific ruthenium compound. This chain diene compound is a promising raw material for terpene. It has a structure represented by the general formula (I): wherein R1 represents H, a C1-C6 alkyl group which may be substituted or a C2-C6 alkenyl group which may be substituted, R2 represents a phenyl group which may have a C1-C4 alkyl group or a C1-C12 acyloxy group which may have a phenyl group or a naphthyl group, or a benzyl group or R2 is a hydroxy group which reversibly forms an aldehyde group through shifting of the position of the double bond adjacent to said hydroxy group. The chain diene compound is produced by reacting 2-substituted-1,3-butadienes with terminal olefins in the presence of a ruthenium compound in a hydrophilic solvent.

Abstract: The invention provides a chain diene compound with desirable regioselectivity, in the presence of a specific ruthenium compound. This chain diene compound is a promising raw material for terpene. It has a structure represented by the general formula (IX): wherein R1 represents H, a C1-C6 alkyl group which may be substituted or a C2-C6 alkenyl group which may be substituted, R2 represents a phenyl group which may have a C1-C4 alkyl group or a C1-C12 acyloxy group which may have a phenyl group or a naphthyl group, or a benzyl group or R2 is a hydroxy group which reversibly forms an aldehyde group through shifting of the position of the double bond adjacent to said hydroxy group. The chain diene compound is produced by reacting 2-substituted-1,3-butadienes with terminal olefins in the presence of a ruthenium compound in a hydrophilic solvent.