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JPH1036300A |
To obtain a primary alcohol, secondary alcohol and secondary amine by reduction of an aldehyde, ketone and imine, respectively, using an inexpensive and easy-to-handle trichlorosilane. An aldehyde, ketone and imine are reduced into the c...
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JP2705792B2 |
Bicyclic aromatic compound having the formula (R) wherein R1, R2, R3 and R4 represent hydrogen or alkyl, at least two of R1-R4 radicals being other than hydrogen, A represents methylene or dimethylene; when A represents dimethylene, R1 a...
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JP2705937B2 |
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JPH1025324A |
To obtain the subject composition containing a higher aliphatic diol and a specific compound, remarkably improved in coloration resistance with time, and useful as a monomer composition for a transparent synthetic resin, etc. This higher...
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JP2704413B2 |
A copper chromite hydrogenation catalyst of enhanced activity is obtained by an ante-pre-reduction treatment in which a copper chromite catalyst precursor is soaked in a reducing atmosphere at temperatures below a pre-reduction temperatu...
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JP2700187B2 |
PURPOSE:To industrially advantageously produce an acetylene alcoholic deriv. by a safe and simple operation by electrolyzing a specified acetylene deriv. in the presence of a carbonyl compd. or paraformaldehyde. CONSTITUTION:A carbonyl c...
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JP2694386B2 |
The present invention relates to a stereospecific chemical synthesis of optically pure enantiomers of 2-aryl-alkanoic acids, especially those of the biologically active (S)-aryl-propionic acids, in good chemical yields, useful for prepar...
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JP2692247B2 |
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JPH09323948A |
To produce an optically active alcohol compound useful as a synthetic intermediate for pharmaceuticals, etc., at a low cost by reacting a prochiral carbonyl compound with an optically active organic Al compound composed of a binaphthyl a...
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JP2689589B2 |
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JP2689590B2 |
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JP2690356B2 |
Preparation of E7/Z9-alkadien-1-ols of the formula I (where R<1> = C1-C8-alkyl, R<2> = H or a base-stable hydroxyl protecting group) by reacting an optionally OH-protected 7-hydroxyheptanal II OHC-(CH2)6-OR<2> II with a phosphorus ylide ...
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JP2684476B2 |
PURPOSE: To obtain the subject compounds showing a remarkable germicidal effect in a high yield by reducing an azolylmethyloxabicyclohexane derivative. CONSTITUTION: An azolylmethyloxabicyclohexane derivative represented by formula I (R1...
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JP2682129B2 |
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JP2681057B2 |
2,2, min -Bis(diphenylphosphino)-5,5 min ,6,6 min ,7,7 min ,8,8 min -octahydro-1,1 min -binaphthyl is a novel phosphine compound of formula (I): The compound is prepared by a series of reactions from a 2,2 min -dihalogeno-1,1 min -binaph...
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JP2679754B2 |
PURPOSE: To smooth an antibacterial film surface by having cyclodextrin clathrate compound with isothiocyanate compound or the like enclosed dispersively contained in a synthetic resin film. CONSTITUTION: Cyclodextrin clathrate compound ...
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JPH09290163A |
To obtain a solid Lewis acid catalyst which can be recovered for reuse by simple operation such as filtration and is stable to water by containing a metal-carrying polymer having a unit expressed by a specified formula in the Lewis acid ...
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JP2672145B2 |
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JP2672144B2 |
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JPH09286750A |
To obtain high-quality 1,4-benzenediethanol useful as a monomer for polyesters, etc., at a relatively low cost. First, p-divinylbenzene of formula I and an oxidizing agent such as an organic peroxide or hydrogen peroxide are subjected to...
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JPH09286748A |
To provide a method for the subject dehydropurification having a good dehydration effect with a minimal thermal energy without deposition of any salt. First, at least one kind of potassium salt 2 selected from at least dipotassium hydrog...
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JP2669885B2 |
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JP2669553B2 |
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JPH09278692A |
To obtain an α-terpineol from α-pinene, etc., by a one-stage reaction in high yield by using a Bronsted acid having a specific pKa as a catalyst. (B) At least one selected from α-pinene, β-pinene and 3-carene (preferably α-pinene) i...
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JPH09278693A |
To obtain an α-terpineol useful as soap, perfume and an aromatic ingredient for cosmetics from α-pinene, etc., by a one-stage reaction in high yield by using a specific rare earth metal catalyst as a catalyst. (B) At least one selected...
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JPH09510716A |
A method for synthesizing enantiomerically enriched chemical intermediates with predetermined chirality is described. The method comprises formation of a pseudoephedrine amide, followed by stereoselective alkylation at the alpha carbon. ...
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JP2667294B2 |
Indane and indene derivs. of formula (I) and their salts are new. In (I), R1 = X(CH2)nAr, X(CH2)nR8 or a gp. (a); R2 = H, Ar or (a); P1 = X(CH2)nR8; P2 = X(CH2)nR8 or XR9Y; R3, R5 = R11, H, OH, 1-8 alkoxy, S(O)qR11, N(R6)2, Br, F, I, Cl,...
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JP2664973B2 |
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JP2666851B2 |
Dien-1-ols of the general formula I (I) where the radicals R1 to R7 are identical to or different from one another and each is hydrogen or straight-chain or branched alkyl or 1-12 carbon atoms and n is 1-14, are prepared by dehydrating a...
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JP2665881B2 |
Acetylenic alcohol which is an inhibitor of hydrosilylation reactions, of formula R - (R') C (OH) - C IDENTICAL CH (I> where . R is a linear or branched alkyl radical, or a phenyl radical; . R' is H or R; it being possible for the radica...
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JP2664455B2 |
A process for the preparation of phenylethanols of the formula in which R denotes hydrogen, alkyl radicals having 1 to 4 carbon atoms, alkoxy radicals having 1 to 4 carbon atoms, fluorine radicals, trifluoromethyl radicals and/or trifluo...
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JP2662965B2 |
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JPH09263557A |
To obtain an unsaturated alcohol under mild conditions in good yield by using a complex comprising a specific halogenated organic quaternary salt and a specific metal halide as a catalyst and using an inexpensive formaldehyde aqueous sol...
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JPH09263556A |
To produce an unsaturated alcohol in good yield from an inexpensive formaldehyde aqueous solution by using a catalyst composition comprising a specific metal halide and a quaternary salt type ion exchange resin. An olefin of formula II [...
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JPH09262479A |
To obtain a high activity Lewis acid catalyst usable even under coexistence of water. A resin complex consisting of a metallic halide represented by the formula and a quat. salt type anion exchange resin is synthesized. In the formula, M...
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JPH09262478A |
To obtain a useful novel resin complex acting as a catalyst for production of unsatd. alcohol from olefin and aldehyde under mild conditions. This complex consists of a metallic halide represented by the formula and a quat. salt type ani...
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JPH09255592A |
To obtain an optically active alcohol which is useful as a medicine, agrochemical or the like in high asymmetric yield by asymmetric reduction of an unsymmetrical ketone with hydroborane in the presence of a chiral β- aminoalcohol and a...
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JP2659407B2 |
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JPH09249598A |
To suppress an amount of ethylbenzene generated as by-product to sufficiently low level and obtain the subject compound in high selectivity by using a copper-based catalyst comprising a molded pellet having a specific diameter when aceto...
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JP2653706B2 |
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JPH09241193A |
To easily obtain an optically active diol having high optical purity by reducing a diketone with an asymmetric reducing agent composed of a borane and a specific optically active amino alcohol having a substituted silyloxy group at 3-pos...
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JPH09241238A |
To obtain a pyrrole compound having good recording characteristics and useful for optical recording media excellent in light resistance. This bispyrrole compound is expressed by formula I (R1 is H, an alkyl; R2-R6 are each H, an alkyl, a...
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JP2650886B2 |
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JPH09235244A |
To readily obtain dihydromyrcenol or myrcenol useful as an aromatic substance, etc., without causing problems in wastewater treatment simply by carrying out the transesterification with a specific ester as a starting substance. This tran...
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JPH09227427A |
To suppress byproduction of an alkylmethanedioxane under mild conditions and obtain an unsaturated alcohol in high selectivity by reacting an olefin with an aldehyde compound in the presence of a specific amorphous conjugate oxide. When ...
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JPH09227426A |
To industrially and advantageously obtain alkadienols without losing a phosphine compound by subjecting a changed material of phosphine produced with reaction to decomposition treatment to regenerate phosphines and recycling the phosphin...
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JP2648176B2 |
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JPH09508399A |
The invention relates to a process for producing 3-aryl propines in which alkines are reacted with benzyl halides in the presence of a palladium compound and weak bases, and to some novel 3-aryl propines.
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JP2642959B2 |
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JPH09208510A |
To obtain 4 4-bis(hydroxymethyl)diphenyl in high yield, starting from 4, 4'-bis (chloromethyl)diphenyl. 4,4'-Bis(chloromethyl)diphenyl is hydrolyzed in a hydrophilic organic solvent in the presence of an alkali catalyst to form 4,4'-bis(...
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