摘要:
The object of the present invention is to provide 3-hydroxy-3-(2-thienyl)propionamides useful as synthesis intermediates of pharmaceutical preparations and the like and a method for obtaining optically active 3-amino-1-(2-thienyl)-1-propanols using the same with high reaction yield, high optical yield and industrially low cost. According to the present invention, 3-amino-1-(2-thienyl)-1-propanols are obtained by carrying out asymmetric reduction of a β-ketocarbonyl compound having thiophene ring in the presence of a catalyst constituted from a compound of a group VIII or IX metal in the periodic table (e.g., a ruthenium compound) and an asymmetric ligand represented by a specified optically active diamine derivative (e.g., a diphenylethylenediamine derivative), or using a cell, a treated product of said cell or the like of a microorganism, and as occasion demands, carrying out amidation of the ester group and then carrying out reduction of the amido group. (each of the substituents is as described in claim 1).
摘要:
The object of the present invention is to provide 3-hydroxy-3-(2-thienyl)propionamides useful as synthesis intermediates of pharmaceutical preparations and the like and a method for obtaining optically active 3-amino-1-(2-thienyl)-1-propanols using the same with high reaction yield, high optical yield and industrially low cost.According to the present invention, 3-amino-1-(2-thienyl)-1-propanols are obtained by carrying out asymmetric reduction of a β-ketocarbonyl compound having thiophene ring in the presence of a catalyst constituted from a compound of a group VIII or IX metal in the periodic table (e.g., a ruthenium compound) and an asymmetric ligand represented by a specified optically active diamine derivative (e.g., a diphenylethylenediamine derivative), or using a cell, a treated product of said cell or the like of a microorganism, and as occasion demands, carrying out amidation of the ester group and then carrying out reduction of the amido group. (each of the substituents is as described in claim 1).
摘要:
A photoconductive material comprising a mixed crystal of at least two phthalocyanine compounds whose central substances are different from each other, the phthalocyanine compounds being represented by formula (I): ##STR1## wherein A represents a substance capable of bonding to the phthalocyanine ligand through a covalent bond or a coordinate bond. The photoconductive material exhibits stability to heat and light and sufficient sensitivity in the visible to near infrared region.
摘要:
An electrolytic paper for an electrolytic capacitor interposed between an anode foil and a cathode foil is made of cellulose fiber induced with organic substituent. The inducing reaction of the organic substituent is selected from etherification for hydroxyl group contained in the cellulose fiber, esterification for hydroxyl group contained in the cellulose fiber, or acetalization for hydroxyl group contained in the cellulose fiber. The swelling degree of the electrolytic paper made of this organic substituent induced fiber for electrolyte is increased.
摘要:
The present invention provides a hair cosmetic composition containing the following ingredients (1) to (4): (1) petrolatum in an amount of 0.01 to 20 mass % with respect to the cosmetic composition; (2) a hydroxyalkylurea in an amount of 0.001 to 30 mass % with respect to the cosmetic composition; (3) a tertiary amine cationic surfactant and/or a quaternary ammonium salt cationic surfactant in an amount of 0.1 to 10 mass % with respect to the cosmetic composition; and (4) water. The hair cosmetic composition can finish the hair, after shampooing, with excellent smoothness, suppleness, and moistness and which is suitable for use as a rinse, a conditioner, etc.
摘要:
An object of the present invention is to provide a industrially appropriate method for producing the β-anomers of ribofuranose derivatives in a highly selective manner at a high yield. The present invention provides a method for producing ribofuranose derivatives wherein β-anomers is precipitated from among the generated furanose derivatives by controlling the amount of a reaction reagent used and/or using a poor solvent in the acetolysis reactions of 2,3,5-tri-O-acyl-1-O-alkyl-ribofuranose and 2,3-di-O-acyl-1-O-alkyl-5-deoxy-ribofuranose.
摘要:
A process for efficiently producing a nucleic acid derivative by condensing a specific nitrogen-containing heterocyclic compound such as a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose using a less expensive and safe reagent. Namely, a process for producing a nucleic acid derivative by condensing a dinitrogen 6-membered heterocyclic compound or a trinitrogen 5-membered heterocyclic compound with a pentose in the presence of an iron halide.
摘要:
An object of the present invention is to provide a industrially appropriate method for producing the β-anomers of ribofuranose derivatives in a highly selective manner at a high yield. The present invention provides a method for producing ribofuranose derivatives wherein β-anomers is precipitated from among the generated furanose derivatives by controlling the amount of a reaction reagent used and/or using a poor solvent in the acetolysis reactions of 2,3,5-tri-O-acyl-1-O-alkyl-ribofuranose and 2,3-di-O-acyl-1-O-alkyl-5-deoxy-ribofuranose.