摘要:
Provided herein are methods of decreasing a level of kynurenic acid in a cell and of treating a pathophysiological condition in a subject associated with an increase in kynurenic acid in a subject. In these methods the inhibitory action of dicarboxylic acids or derivatives or analogs thereof are effective to inhibit activity of kynurenine aminotransferase II. Also provided is a method of screening for potential inhibitory compounds for kynurenine aminotransferase II. The dicarboxylic acids or derivatives or analogs thereof may have the structural formula, where R1 is H, NH2 or NHCH3, R2 is H or CH3, n is 0 to 14, and X is —COOH, CH2OH, —PO3H2, —SO3H, or —SO3H; or a pharmacologically acceptable salt.
摘要:
A wake-up remedy that for persons with the subjective symptoms of feeling languid after wake-up, having a hard time awaking, etc., relieves the symptoms and allows them to have a fulfilling life. There is provided a wake-up remedy containing alanylglutamine or its salt as an active ingredient.
摘要:
One embodiment of the present invention relates to ionic liquids and ionic viscoelastics formed between [1] a small molecule or macromolecule containing two or more cations; and [2] a small molecule or macromolecule containing two or more anions. Another embodiment of the invention is the use of the inventive ionic liquids and ionic viscoelastics, formed between a small molecule or macromolecule containing two or more cations and a small molecule or macromolecule containing two or more anions, to form a crosslinked network. In certain embodiments, the ionic liquids formed can be viscous liquids, viscous liquid formed networks, or viscoelastic networks/gels. In certain embodiments, the ionic material of the invention may be used for a variety of applications including, but not limited to, lubricants, additives, gas separation, liquid separation, membranes, fuel cells, sensors, batteries, coatings, heat storage, liquid crystals, biocompatible fluids, solvents, and electronic materials.
摘要:
An enantioselective method for producing optically active 3-alkyl carboxylic acids comprises transforming an optically active secondary alcohol into an optically active, activated compound by introducing a leaving group; reacting the activated compound with a malonic acid derivative to obtain an optically active, alkylated malonic acid compound, the reaction taking place exclusively in ether and/or carboxylic acid ester solvents and one or more aprotic polar solvents or alcohols as a cosolvent in a maximum proportion of 30 volume percent of total solvent, wherein the added cosolvent is not hexamethyl phosphoric acid triamide; the malonic acid compound is hydrolyzed if necessary to obtain the corresponding acid; and the corresponding acid is decarboxylated.
摘要:
This invention relates to methods for controlling the oxidation of hydrocarbons to dibasic acids, in the presence of a catalyst and a monobasic acid, by removing the catalyst from the reaction mixture, outside the oxidation zone, after the oxidation has taken place at least partially. Initially, the catalyst is partially precipitated and removed by reducing the water level in the reaction mixture and/or subjecting the reaction mixture to a temperature, at which or over which catalyst precipitates. After the initial partial precipitation of the catalyst, the remaining catalyst is subjected to a thermal treatment, during which at least part of the monobasic acid is removed leaving behind molten dibasic acids, in which, at least a major part of the remaining catalyst is precipitated, and it is removed. A minor part of remaining catalyst is removed by methods, which include but are not limited to ion exchange, precipitation with a base or appropriate salt, and electrodialysis. The precipitated catalyst in the three removal stages may be recycled in miscellaneous ways. The dibasic acid(s) may be removed at least partially before or after any catalyst precipitation stage.
摘要:
Inhibitors for matrix metalloproteases, pharmaceutical compositions containing them, and a process for using them to treat a variety of physiological conditions. The compounds of the invention have the generalized formula ##STR1## wherein each T is a substituent group; x is 0, 1, or 2; the group D represents ##STR2## the group R6 represents a variety of possible substituent groups on the carbon chain between D and G, and the group G represents M, ##STR3## in which M represents --CO.sub.2 H, --CON(R.sup.11).sub.2, or --CO.sub.2 R.sup.12; and R.sup.13 represents any of the side chains of the 19 noncyclic naturally occurring amino acids.
摘要:
Inhibitors for matrix metalloproteases, pharmaceutical compositions containing them, and a process for using them to treat a variety of physiological conditions. The presently claimed compounds have the generalized formula ##STR1## in which each T represents a substituent group; x is 0, 1, or 2; D represents ##STR2## .delta. is 0 or 1; U' represents O, S, or N, with the proviso that when U' is N, then .delta.=0, and when U' is O or S, then .delta.=1; R.sup.14 is any of a variety of substituent groups; and G represents M, ##STR3## in which M represents --CO.sub.2 H, --CON(R.sup.11).sub.2, or --CO.sub.2 R.sup.12, R.sup.11 represents H or an alkyl group, R.sup.12 represents an alkyl group, and R.sup.13 represents any of the side chains of the 19 noncyclic naturally occurring amino acids; and pharmaceutically acceptable salts thereof.
摘要:
The present invention relates to optically active diphosphines. It is also targeted at their preparation according to a process for the resolution of the racemic mixture of the said phosphines to optically active isomers. The subject of the invention is new optically active bis�1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene!diphosphines and a process for resolving the racemic bis�1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene! mixture which comprises reacting it with a palladium or platinum complex as chiral auxiliary in an organic solvent, thus forming diastereoisomer complexes, and then resolving the said optically pure complexes. The invention also relates to new optically active metal complexes comprising the said phosphines and to their use in a process for the preparation of optically active carboxylic acids and/or derivatives according to a process for the hydrogenation of .alpha.,.beta.-unsaturated carboxylic acids and/or derivatives.
摘要:
Process for the preparation of aliphatic or aromatic mono- or dicarboxylic acids of 4 to 22 carbon atoms by oxidation of the corresponding aldehydes having the same number of carbon atoms in a carboxylic acid from the group consisting of formic acid, acetic acid, and propionic acid or in a carboxylic acid/water mixture at a temperature of 50.degree.-130.degree. C. and at 1 to 25 bar and in the presence of an oxidizing agent.