摘要:
T-butyl (R)-(-)-4-cyano-3-hydroxybutyrate having an optical purity of 99%ee or higher and a process for producing the same are disclosed, the process comprising cyanogenation of a t-butyl (S)-(-)-4-halogeno-3-hydroxybutyrate obtained by enantioselective hydrogenation of a t-butyl 4-halogenoacetoacetate. Recrystallization of the resulting crude product gives the optically active compound with high optical purity.
摘要:
A (3R,5S)-3,5,6-trihydroxyhexanoic acid derivative and a process of producing the (3R,5S)-3,5,6-trihydroxyhexanoic acid derivative which comprises the step of enantioselectively hydrogenating an (S)-5,6-dihydroxy-3-oxohexanoic acid derivative with a specific ruthenium-optically active phosphine complex represented as a catalyst are disclosed. The (3R,5S)-3,5,6-trihydroxyhexanoic acid derivative which is a useful compound capable of being easily converted into a lactone moiety, which is the active part of an inhibitor on HMG-CoA reductase, can be easily and efficiently obtained under a mild reaction condition with a high selectivity for the syn-diol form.
摘要:
A fragrant compound or fragrant composition stable for a long period of time in an acidic hard article surface cleaning liquid adjusted so as to be acidic, particularly to pH 2.0 to 3.0 with an organic acid. One or more of fragrant compounds selected from the group consisting of 2,6-dimethyl-2-heptanol, 3,3-dimethylcyclohexyl methyl ketone, o-tert-butylcyclohexanol, α-amylcinnamic aldehyde, α-damascone, γ-octalactone, γ-nonalactone, γ-decalactone, anethole, ethyl benzoate, ethyl 2,2,6-trimethylcyclohexanecarboxylate, 2,2,6-trimethyl-1-crotonylcyclohexane, 6-acetyl-1,1,2,4,4,7-hexamethyltetrahydronaphthalene, isoamyl phenylethyl ether, methyl octin carbonate, 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone, tricyclodecenyl acetate, undecyl aldehyde, fenchyl acetate, dihydrojasmone, cedryl methyl ether, p-cresol, hexyl aldehyde, and rosephenone are stable.
摘要:
A mosquito-repelling agent which is gentle to human and environment and safe, and has an excellent mosquito-repelling effect almost equal to the effect of DEET and also an excellent persistency of the effect. The mosquito-repelling agent comprises a mixture of isomenthone, linalool, geraniol, citral and citronellol as an effective ingredient for a mosquito-repelling effect, which may be contained in a fragrant composition.
摘要:
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): R.sup.2 --COO--R.sup.3 (2) wherein R.sup.2 is the same as R.sup.2 in general formula (3) and R.sup.3 represents a lower alkyl group, in a reaction system comprising an alcoholic solvent and in the presence of a basic catalyst, said reacting step forming a lower alcohol as a by-product; and removing the lower alcohol formed during the reaction from the reaction system.
摘要:
The present invention provides an antibacterial and fungicidal agent containing an amino compound of formula (1) or a salt thereof. The invention also provides a method for imparting antibacterial and fungicidal properties to a variety of objects using the compound. ##STR1## wherein .phi. represents a phenyl group, a substituted phenyl group (wherein the substituents are 1-5 members arbitrarily selected from the group consisting of a hydroxyl group, halogen atoms, lower alkoxyl groups, trifluoromethyl group, an amino group, and a methylenedioxy group), or an imidazolyl group; R.sup.1 represents a hydrogen atom or a lower alkyl group; and R.sup.2 represents a C6-C12 alkyl group. The amino compound of formula (1) or a salt thereof exhibits excellent antibacterial effects and fungicidal effects, and when it is applied to a variety of articles used in industry, commodities, etc., enhanced antibacterial effects and fungicidal effects are obtained.
摘要:
An object of the present invention is to provide a collapsible stretcher. The stretcher comprises: a mattress section having a rectangular shape, the mattress section being made of a material, which is capable of absorbing air, the mattress section being capable of spreading by absorbing air and being wound from a longitudinal end when air is discharged; a cover section for accommodating the mattress section, the cover section having a rectangular shape; belt holders being provided on both longitudinal edges of the cover section; and a belt being run through the belt holders, the belt being formed into a loop. Having the windable and light mattress section and no long shafts, the stretcher can be easily and rapidly managed even in narrow places.
摘要:
The cool feeling composition of the present invention obtained by combining a cool feeling substance containing at least one compound selected from 1-menthol, isopulegol, 3-(1-menthoxy)propane-1,2-diol, 2-(1-menthoxy)ethan-1-ol, 3-(1-menthoxy)propan-1-ol, 2-methyl-3-(1-menthoxy)propane-1,2-diol, N-ethyl-1-menthylcarboxamide, p-menthane-3,8-diol, 1-menthyl lactate, and 2-isopropyl-N,2,3-trimethylbutanamide with a salicylic acid ester represented by the following general formula (I), such as 2-hydroxyethyl salicylate, improves strength and persistency of cool feeling effect, particularly, those containing 1-menthol as the cool feeling substance can alleviate the irritant fragrance note resulting from 1-menthol. Mixing of the cool feeling composition or fragrance composition containing the same with products such as foods and drinks, cosmetics, toiletry products, bath agents, and pharmaceuticals can afford products wherein the above features of the cool feeling composition of the invention are effectively exerted. wherein R represents a hydrocarbon group having 1 to 18 carbon atoms which may has a substituent.
摘要:
Convenient methods for judging mouth odor with the use of an artificial mouth odor prepared by a convenient method which load any burdens neither on the operator nor on the subjects. Saliva collected immediately after wake-up is cultured under anaerobic conditions and head space components of the thus cultured saliva are analyzed, or anaerobic bacteria contained in the collected saliva are counted.
摘要:
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.