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JP2533180B2 |
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JPH08231447A |
To simply obtain the objective alcohol at a relatively low temperature and pressure in a low cost with a high selectivity by reducing an optically active carboxylic acid with hydrogen under a prescribed condition in the presence of a rut...
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JPH08231451A |
PURPOSE: To obtain the subject compound, represented by a specific formula, having characteristics of imparting an excellent aroma, flavor and smoke volume to tobacco or enhancing the aroma, flavor and smoke volume and useful for improvi...
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JP2530789B2 |
The present invention relates to ceramic materials containing a homogeneous dispersion of metal particles, particularly sol-gel ceramic materials, a method of preparing the same, and processes for hydrogenating and oxidizing organic comp...
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JP2529850B2 |
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JPH08225474A |
PURPOSE: To obtain benzhydrols useful as a photo polymerization initiator and a raw material for pharmaceuticals at a low cost in a high yield by reacting an aryl compound with an aromatic aldehyde. CONSTITUTION: The compound of formula ...
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JPH08225480A |
PURPOSE: To obtain an ene-yne compound useful as a synthetic intermediate of an active form of a vitamin D3 derivative in an effective manner by reacting an optically active alcohol derivative with an ethylene metal salt and subsequently...
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JPH08225475A |
PURPOSE: To obtain halomethylphenylcarbinols having high optical purity by reducing a halomethylphenyl ketone by using an asymmetrically reducing agent obtained from a specific β-aminoalcohol and boranes. CONSTITUTION: This compound of ...
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JP2528972B2 |
A novel and efficient method is proposed for the synthetic preparation of a long-chain alkynyl compound in a one-pot reaction without isolating the intermediate from the reaction mixture. The inventive method comprises the steps of: (a) ...
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JPH08217775A |
PURPOSE: To obtain the subject new compound which is a crown thioether, having a specific structure, acting as a ligand of a catalyst for asymmetric synthesis and capable of providing complexes with various transition metals enabling the...
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JPH08217711A |
PURPOSE: To highly stereoselectively obtain a triol useful as an intermediate for synthesizing an active type VD derivative by reducing a β-hydroxyketone prepared from readily obtainable L-malic acid having 100% optical purity. CONSTITU...
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JP2526989B2 |
An industrially meritorious process for preparing aromatic polyhydric alcohol is disclosed. The process can give an extremely high conversion rate of raw material, i.e., aromatic carboxylic acid ester, and an extremely high selectivity t...
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JP2525127B2 |
The borane reduction of prochiral ketones to optically pure alcohols is effectively achieved by the utilization of catalytic amounts of the new and valuable oxazaborolidine catalysts of formula (I).
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JPH08208543A |
PURPOSE: To rapidly obtain alcohols useful as a synthetic intermediate for medicines, etc., in high yield under mild conditions by reducing a carboxylic acid using a borane-pyridine complex as a reducing agent in the coexistence of a Lew...
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JP2521695B2 |
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JPH08198788A |
PURPOSE: To suppress the amount of ethylbenzene formed as a by-product to a sufficiently low level and obtain α-phenylethyl alcohol useful as a raw material for styrene and various perfumes in high selectivity using a readily preparable...
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JPH08198787A |
PURPOSE: To continuously produce alkadienols in high conversion rate and selectivity by reacting a conjugated alkadiene with water in the presence of a palladium-phosphorus catalyst and carbon dioxide. CONSTITUTION: The reaction in the f...
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JP2520461B2 |
Process for preparing unsaturated alcohols by hydrogenation of an unsaturated carbonyl compound in the presence of a catalyst consisting of a ruthenium derivative associated with a ligand which is soluble in water or a ruthenium complex ...
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JP2520580B2 |
PURPOSE: To provide the subject novel synthetic intermediate useful for the direct synthesis of vitamin A or carotenoids at a high yield and at a high selectivity. CONSTITUTION: There is provided a novel intermediate of formula I (wherei...
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JP2516617B2 |
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JP2517796B2 |
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JP2516618B2 |
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JPH08506816A |
Process of treatment of mammals, including humans to treat diseases or conditions of the type which are normally treated with retinoid-like compounds is disclosed, with pharmaceutical compositions containing an active compound which is a...
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JP2515292B2 |
Unsaturated norbornane, 2,2-dimethyl norbornane, adamantane or cyclododecane derivatives exhibit activity in the systemic and topical treatment of dermatologic disorders.
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JP2515341B2 |
The present invention relates to novel specifically-substituted phenyl compounds, especially substituted di-tert-butyl phenol derivatives, which are effective as anti-inflammatory, analgesic and/or antipyretic agents. These phenyl compou...
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JP2514002B2 |
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JPH08176037A |
To obtain the subject complex in a short time without generating byproduct lithium carbide and without using an expensive refrigerator by reacting lithium amide with acetylene in ammonia at a specified temperature. This compound is obtai...
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JPH08176039A |
PURPOSE: To obtain the subject compounds having high optical puritties from halomethylphenyl ketones and facilitate post-treatment after reaction by using an asymmetric reducing agent obtained from a specific β-aminoalcohol and boranes....
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JPH08176036A |
PURPOSE: To efficiently recover a catalytic component and suppress lowering of production rate of the subject compound by reacting conjugated alkadienes with water using a Pd compound and a coordinated phosphorus compound as a catalytic ...
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JP2513283B2 |
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JP2512067B2 |
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JP2509718B2 |
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JP2510785B2 |
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JP2511256B2 |
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JP2511088B2 |
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JPH08165258A |
PURPOSE: To provide the aromatic compound having sufficient spontaneous polarization and useful as a low viscous liquid crystal material capable of responding at a high speed and as its component. CONSTITUTION: This compound is expressed...
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JP2508651B2 |
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JP2509282B2 |
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JPH08157402A |
PURPOSE: To provide a method for decomposing a polyester under mild conditions, capable of producing a decomposition product not requiring purification. CONSTITUTION: A polyester is decomposed by using a metal alkoxide of the formula ROM...
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JPH08505375A |
Substituted triols are prepared by reducing appropriately substituted carboxylic esters. The substituted triols can be used as active substances in medicaments.
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JPH08151337A |
PURPOSE: To provide an aromatic compound which is useful as an optical switching element and a material for liquid crystal display element. CONSTITUTION: This compound is represented by formula I (R1 is an alkyl, an alkoxyalkyl; R2 is an...
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JPH08151340A |
PURPOSE: To obtain the subject high-purity compound useful as a synthetic intermediate for attracting pheromones of insect pests for citrus fruits in high yield by passing (Z)-2-hexene-1,4-diol as a starting raw material through four ste...
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JPH08143493A |
PURPOSE: To safely and profitably obtain an alcohol in good yield and in good selectivity under mild conditions comprising a low temperature and a low pressure by directly hydrating an olefin in the presence of a catalyst comprising a hi...
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JPH08143482A |
PURPOSE: To obtain a new acetylene derivative excellent in quick response and ferroelectricity, thus useful as a material for light switching elements and liquid crystal display elements, etc. CONSTITUTION: This compound, a new acetylene...
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JP2502936B2 |
PURPOSE: To obtain a new acetylenic derivative useful as a synthetic intermediate of vitamins A and E. CONSTITUTION: The compound of formula I [R1 is phenyl or a group of formula II (R2 is a 1-11C saturated aliphatic group, 2-11C unsatur...
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JPH08134076A |
PURPOSE: To obtain a chiral oxazaborolidine compound, and to obtain both of optically active R-form and S-form of an alcohol in high asymmetric yield. CONSTITUTION: This chiral oxazaborolidine compound is expressed by formula I (R1 is me...
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JPH08117605A |
To develop an improved catalyst for isomerizing epoxides into allylic alcohols. A supported catalyst comprising 5-95 wt.% lithium phosphate and 5-95 wt.% high-purity silica support (wherein the content of silicon dioxide is at least 98 w...
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JPH08119890A |
PURPOSE: To produce an (R)-3'-substituted phenylbromomethyl carbinol useful as a synthetic intermediate for a treating agent for diabetes and hyperglycemia, an agent for prevention and treatment of obesity, etc., in high optical purity a...
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JPH08504084A |
PCT No. PCT/FR93/00943 Sec. 371 Date Jun. 12, 1995 Sec. 102(e) Date Jun. 12, 1995 PCT Filed Sep. 27, 1993 PCT Pub. No. WO94/08028 PCT Pub. Date Apr. 14, 1994The present invention relates to a novel enzymatic process for the preparation o...
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JPH0889282A |
To obtain a compound useful as a base material for perfumes and useful in the field of pharmaceutical formulation by reacting the immixture of stereoisomeric alcohols with an acylating agent in the presence of a hydrolysate in a biphasic...
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