摘要:
Provided is a method for efficiently producing high-purity hydrogenated biphenol based on a simple method that can be industrially utilized using easily-available biphenol as a starting material. The method for producing hydrogenated biphenol according to the present invention is a method for producing hydrogenated biphenol by hydrogenating biphenol represented by the following formula (1):
to obtain hydrogenated biphenol represented by the following formula (2):
the method comprising: a reaction step of hydrogenating the biphenol represented by formula (1); and a purification step of washing or crystallizing a reaction product obtained from the reaction step using an aromatic hydrocarbon.
摘要:
Provided is an industrially advantageous method for producing optically active alcohols in high yields from ketones of various structures by using an inexpensive chiral catalyst. The method of the present invention for producing optically active alcohols comprises reducing a ketone in the presence of an iridium(III) complex having a chiral prolinamide compound as a ligand. The ketone is preferably a compound represented by formula [I]:
(wherein R 1 and R 2 are different from each other, and each represent an optionally substituted straight or branched alkyl group, an optionally substituted cycloalkyl group, an optionally substituted aryl group, an optionally substituted heteroaryl group, an optionally substituted aralkyl group, an optionally substituted heteroarylalkyl group, an optionally substituted alkenyl group or an optionally substituted alkynyl group, and R 1 and R 2 may be bound to each other at any appropriate position to form a ring, the ring optionally containing one or more atoms which may be the same or different and are selected from an oxygen atom, an optionally substituted nitrogen atom and a sulfur atom, and optionally being condensed with an aromatic or hetero-aromatic ring).
摘要:
Compounds of formula (Ia): wherein R1, R2, R3, R4a, R4b, R5 and R6 are defined herein, as well as other indene derivatives are disclosed herein. Pharmaceutical compositions containing the compounds and methods of using the compounds are also disclosed.
摘要:
Die Erfindung betrifft eine Verbindung der Formel (VII)
eine Riechstoff- oder Aromakomposition, umfassend eine solche Verbindung, sowie ein parfümiertes oder aromatisiertes Produkt, umfassend eine solche Verbindung. Die Erfindung betrifft ferner die Verwendung einer Verbindung der Formel (VII) als Riechstoff und/oder zur Verbesserung der Fixierung einer Riechstoff- oder Aromakomposition. Die Erfindung betrifft außerdem ein Verfahren zum Herstellen einer Verbindung der Formel (VII), ein Verfahren zum Herstellen eines Vorproduktes der Verbindung der Formel (VII) sowie das Vorprodukt selbst. Sie betrifft außerdem ein Verfahren zum Erzeugen, Verstärken oder Modifizieren eines Sandelholzgeruches in einer Mischung.
摘要:
The present invention relates to anhydrous solutions of MX 3 •z LiA in a solvent, wherein M is a lanthanide including lanthanum, or yttrium or indium; z > 0; and X and A are independently or both monovalent anions, preferably Cl, Br or I. The solution is readily prepared by dissolving or suspending MX 3 or its hydrate and z equiv LiA in water or hydrophilic solvents, or mixtures thereof, removing the solvent under vacuum and dissolving the resulting powder in another solvent. The solution of MX 3 •z LiA can advantageously be used e.g. in addition reactions of Grignard reagents to ketones and imines. Even the catalytic use of MX 3 •z LiA is possible. Also claimed are a method for preparing the anhydrous solutions, the use of such solution in a chemical reaction and chemical compositions MX 3 •z LiA, with M, z, X and A as indicated above.
摘要:
A solvent containing at least one cycloalkyl alkyl ether (1) represented by the general formula: R1-O-R2 (wherein R1 is cyclopentyl or the like; and R2 is C1-10 alkyl or the like); and a process for the production of the ethers (1), characterized by reacting an alicyclic olefin with an alcohol in the presence of an acid ion-exchange resin having a water content of 5 wt% or below. The solvent is useful as cleaning solvent for electronic components, precision machinery components or the like, reaction solvent for various chemical reactions, extraction solvent for extracting objective organic substances, solvent or remover for electronic and electrical materials, and so on. The process enables industrially advantageous production of the objective cycloalkyl alkyl ethers (1).
摘要翻译:溶剂含有环烷基烷基醚(1)。 溶剂含有式(1)的环烷基烷基醚,R 1> -O-R 2>(1)R 1>任选取代的环戊基或环己基; R 2>任选取代的1-10C烷基或3-8C环烷基。 (1)含有化合物R 1> -O-R 3>(2)的类似溶剂也包括独立权利要求。 和(2)类似的含有化合物R 4> -O-R 3>(3)的溶剂。 R 3> R 2>; R 4>环戊基。
摘要:
A novel cyclopentanone derivative having a cyclopentanone or cyclopentanol ring having substituents at the 2- and 5-positions is provided. The cyclopentanone derivative preferably has 13 to 17 carbon atoms. A perfume composition comprising the cyclopentanone derivative emits a flora fragrance emphasizing a natural and fresh feeling. It is useful for perfuming a variety of toiletries and households. A process for preparing the above-mentioned cyclopentanone derivative is also provided by which the cyclopentanone derivative can be obtained in a practically acceptable yield.
摘要:
The invention relates to a method for hydrogenating at least one organic compound by bringing said organic compound into contact with a gas containing hydrogen in the presence of a catalyst. Said catalyst comprises ruthenium as an active metal, either alone or combined with another metal of the subgroups I, VII or VIII of the periodic table, deposited on an amorphous silicon dioxide-based support. Said catalyst is obtained by i): treating the amorphous silicon dioxide-based support with a halogen-free aqueous solution of a low-molecular ruthenium compound, and subsequently drying the treated support at a temperature of less than 200 °C, ii) reducing the solid matter obtained in i) with hydrogen at a temperature ranging from 100 to 350 °C, wherein step ii) is carried out directly after step i).
摘要:
Improved methods for the recovery of xanthophylls from corn gluten meal are provided. More specifically, methods for the recovery of xanthophylls from corn gluten whereby relatively dry corn gluten is extracted with an organic alcohol followed by a saponification reaction to convert xanthophyll esters to xanthophylls is described. Also described are methods for the recovery of xanthophylls from corn gluten meal whereby relatively dry corn gluten meal is extracted with a first solvent containing an antioxidant and the resulting extract is, optionally, purified. Using these methods, xanthophylls can be recovered from corn gluten meal in higher yields, at greater efficiencies, and in higher purity as to compared to prior art methods. Moreover, the xanthophyll products recovered in these methods are ideally suited for use in food products and in pharmaceuticals. These materials are especially suited for use in poultry feeds to provide the desired, healthy yellow color or hue in broiler and egg yolks.