Abstract:
PROBLEM TO BE SOLVED: To obtain the subject new compound as a new starburst-type amine with high heat resistance and low ionization potential. SOLUTION: This new compound is a compound of formula I (R is H or an alkyl), e.g. N,N,N',N'-[4,4',4",4'''-tetrakis(N,N-diphenylamino)phenyl]-1,4- diaminobenzene. The compound of formula I (for example, when R is H or a 3-methyl group) is obtained by reaction of N,N,N',N'-(4,4',4",4'''- tetrakisaminophenyl)-1,4-diaminobenzene with a cyclohexanone compound of formula III (e.g. cyclohexanone, methylcyclohexanone) in the presence of a hydrogen-transfer catalyst.
Abstract:
PROBLEM TO BE SOLVED: To industrially obtain a cosmetic having excellent inhibitory effects on pigmentation, skin lightening action, high skin safety and excellent storage stability, comprising a specific hydrochalcone as an active ingredient. SOLUTION: This derivative is shown by formula I (R to R are each H, a 1-20C alkyl, alkenyl or the like), preferably 1,3-bis(2,4-dihydroxyphenyl)-1- propanone of formula II or the like. The derivative is preferably obtained by subjecting a benzaldehyde derivative of formula III and an acetophenone derivative of formula IV to aldol condensation in the presence of a base such as sodium hydroxide or the like or an acid such as hydrochloric acid or the like generally at -10 to 200 deg.C reaction temperature.
Abstract:
PROBLEM TO BE SOLVED: To obtain a resin having (bio)degradability and excellent water absorptivity and water absorption rates by adding a crosslinking agent to a solution prepared by dissolving a polysuccinimide in a good solvent to introduce pendant groups into the polymer, adding a dispersant to the mixture to establish a dispersed state, subjecting the dispersion to a crosslinking reaction in the presence of a base, and hydrolyzing the remaining imide rings. SOLUTION: To a solution prepared by dissolving a polysuccinimide having a weight-average molecular weight of 10,000 or above in a good solvent being at least one amidic organic solvent (e.g. N,N-dimethylformamide) or sulfur- containing organic solvent, a crosslinking agent, such as lysine, cystine, or ornithine as such or as a solution in a suitable organic solvent or water is added to introduce pendant groups into the polymer. Next, the crosslinking agent is activated with a base such as sodium hydroxide, and the reaction mixture is reacted at, desirably, 10-80 deg.C. The imide rings remaining after the crosslinking are hydrolyzed in the presence of water or a water-miscible organic solvent in hot water at 40-100 deg.C.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for industrially and advantageously producing a polyacid anhydride and a copolymer of the polyacid anhydride under a comparatively mild condition while freely controlling the molecular weight by reacting a specific salt-formed compound of a dicarboxylic acid with a chlorinating agent. SOLUTION: (A) A salt-formed compound of obtained by reacting (i) a dicarboxylic acid of the formula (R is a linear aliphatic alkylene, an alicyclic alkylene or an aromatic ring), with (ii) an inorganic base and/or an organic base in an amount equivalent to the carboxyl group of the component (i) or less, is reacted with (B) a chlorinating agent preferably in a solvent (e.g. toluene) without a protonic polar solvent at a temperature of a room temperature to 120 deg.C to provide the objective polyacid anhydride and copolymer of the polyacid anhydride in the method for producing the polyacid anhydride and the copolymer of the polyacid anhydride. Potassium hydroxide, triethylamine or the like is preferably used as the component (ii). Phosgene, phosgene dimer or the like is preferably used as the component B.
Abstract:
PROBLEM TO BE SOLVED: To economically obtain the subject compound capable of extremely rapidly reacting, not causing a waste water treatment problem after the reaction and useful as a coupler for color development type recording materials by performing the reaction in the presence of activated carbon. SOLUTION: This method for producing a phthalide compound of formula II (R -R are each an alkyl or the like) [e.g. 3,3-bis(4-dimethylaminophenyl)-6- dimethylaminophthalide] comprises oxidizing a triphenylmethane compound of formula I e.g. 2-[4,4'-bis(dimethylamino)benzhydryl]-5-dimethylaminobenzoic acid} with an oxidizing agent, preferably one kind of compound selected from air, oxygen, hydrogen peroxide and the mixtures of oxygen with inactive gases in the presence of activated carbon in an aqueous solvent.
Abstract:
PROBLEM TO BE SOLVED: To obtain a phthalide compound useful as a coloring agent for pressure-sensitive recording materials or heat-sensitive recording materials by oxidizing a triarylmethane compound under specific conditions. SOLUTION: A triarylmethane compound of formula II is oxidized with at least one kind of an oxidizing agent selected from air, oxygen, hydrogen peroxide and a mixture of oxygen with inert gas in the presence of an alkali hydroxide at pH of reaction solution adjusted to 9.5-11.0 to provide the objective phthalide compound of formula I (R to R are each an alkyl or R and R , R and R , R and R may mutually br connected to form a heterocyclic ring with N). Adjustment of the pH is preferably carried out by adding an acidic substance such as sulfuric acid and/or an acidic gas such as carbon dioxide to the reaction solution in which pH is raised according to progress of the reaction. Progress of the reaction is promoted by jointly using diatomaceous earth, zeolite or a metal compound as a catalyst. Thereby, the compound of formula I is obtained in a short time, high yield and purity.
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject compound useful as a synthetic raw material for chemicals such as agrochemical, etc., by a method excellent in reaction yield, etc., by using an aprotic polar organic solvent as a reaction solvent in Kolbe-Schmitt's reaction. SOLUTION: An aprotic polar organic solvent such as 1,3-dimethyl-2- imidazolidinone is used as a reaction solvent. A phenol is reacted with an alkali metal compound in the ratio of the phenol to the total of the alkali metal compound and the aprotic polar organic solvent of >1 by molar ratio, preferably 2-10 mols based on the alkali metal compound and 2-30 mols based on the aprotic polar organic solvent to give the alkali metal salt of the phenol. Then the alkali metal salt is reacted with carbon dioxide to give the objective compound.
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition capable of obtaining a molded article excellent in optical characteristics such as light resistance, a molded article such as optical component obtained by molding the resin composition, and an optical pickup device using the optical component.SOLUTION: A resin composition includes: 100 pts.mass of a polymer having an alicyclic structure in at least a part of a repeating unit; and 0.05-5 pts.mass of a hindered amine compound wherein a ratio of a carbon atom inside the molecular structure is 67-80 wt.% and a molecular weight is 500-3,500. A novel piperidine derivative having a piperidylaminotriazine skeleton; a molded article such as an optical component produced by molding the resin composition; and an optical pickup device using the optical component are also provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for efficiently producing a meta-substituted bisaminophenoxybenzene in high purity. SOLUTION: The method for producing a compound of formula(3)( wherein, (n) is an integer of 1-5 ) by reaction between a compound of formula (1) or formula (2)( wherein, X is a halogen atom; and (n) is an integer of 0-3 ) and an alkali metal salt of 3-aminophenol in the presence of an aprotic polar solvent comprises the following (a) to (e) steps: The step (a) comprises distilling off the aprotic polar solvent by distillation from a reaction mixture. The step (b) comprises retrieving the resultant residues into a water-immiscible organic solvent. The step (c) comprises reacting the thus retrieved organic solvent with a mineral acid in the presence of water to retrieve the resultant mineral acid salt into the water. The step (d) comprises retrieving the mineral acid salt of the compound of formula (3) from the resultant mineral acid salt-containing aqueous solution. The step (e) comprises reacting the thus retrieved mineral acid salt with a base in the presence of a water-immiscible organic solvent and water to retrieve the objective compound of formula (3) into the organic solvent. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a new aliphatic polyester copolymer imparting excellent flexibility to an aliphatic polyester, particularly a lactic acid-based resin and free from elution of a plasticizer, etc. and further to provide a film composed of the aliphatic polyester copolymer and excellent in flexibility. SOLUTION: The aliphatic polyester copolymer is obtained by polymerizing a hydroxycarboxylic acid, particularly preferably lactic acid with a glycerol monofatty acid ester and a straight-chain dicarboxylic acid. The film is composed of the aliphatic polyester copolymer. COPYRIGHT: (C)2006,JPO&NCIPI