摘要:
Provided is an aldehyde production method that can provide target aldehydes with excellent aldehyde selectivity and a high conversion for a long period of time. The method includes bringing a mixed gas containing a vaporized primary alcohol and an inert gas into contact with a film-type dehydrogenation catalyst so as to dehydrogenate the primary alcohol in the mixed gas, thereby obtaining an aldehyde. The partial pressure of the primary alcohol in the mixed gas is 50 kPa or lower, and the film-type dehydrogenation catalyst is formed by providing a thin film catalyst layer on a support.
摘要:
The present invention relates to a new process for the preparation of 6-hydroxy-5-arylbicyclo[2.2.2]octan-2-one compounds of the formula (II); which may subsequently be further transformed to compounds of the formula (I): The present invention further relates to novel compounds as such, which compounds are useful intermediates in the above process.
摘要:
Provided is a method of producing lavandulal at a high yield by controlling formation of its isomer of lavandulal as a by-product.In a method of producing lavandulal by making an acetal compound represented by the following formula (I) react with 3-methyl-1-butene-3-ol in the presence of an acid catalyst, the method includes: adding, to a liquid mixture comprising an acid catalyst, an acetal compound represented by the following formula (I), and 3-methyl-1-butene-3-ol in at least a portion of an amount to be used (3-methyl-1-butene-3-ol (a)), 3-methyl-1-butene-3-ol in the other portion of the amount to be used (3-methyl-1-butene-3-ol (b)); and maintaining the liquid mixture at a temperature of 110° C. or higher: in which Each R in the formula (I) represents an alkyl group.
摘要:
The coupling of aryl, heteroaryl, and vinyl halides with α,α-difluoroketones or silyl ethers or siylenol ethers of α,α-difluoroketones and α,α-difluoroamides and esters are described. Further derivatization of the coupling products (such as ketone cleavage and Baeyer-Villiger oxidation) is also described.
摘要:
The invention relates to a process for producing styrene, comprising reacting benzene and acetic acid into methyl phenyl ketone and converting the methyl phenyl ketone into styrene. Preferably, the methyl phenyl ketone is converted into styrene by converting the methyl phenyl ketone into methyl phenyl carbinol and converting the methyl phenyl carbinol into styrene.
摘要:
Objects of the present invention are to provide a novel dehydrogenation reaction catalyst, to provide a method that can produce a ketone, an aldehyde, and a carboxylic acid with high efficiency from an alcohol, and to provide a method for efficiently producing hydrogen from an alcohol, formic acid, or a formate, and they are accomplished by a catalyst containing an organometallic compound of Formula (1).
摘要:
A compound represented by a formula [1D] as shown below (wherein R1A, R1B, R2A, R2B, R3A and R3B represent a hydrogen atom, an optionally substituted C1-6 alkyl group, and the like) is useful as an intermediate for producing a thionucleoside, and the production method of the present invention is useful as a method for producing a thionucleoside.
摘要:
A method of implementing organic synthesis reactions uses a composition containing a metal catalyst originating from a calcined plant. The plants can be from the Brassicaceae, Sapotaceae and Convolvulaceae family, and the metal catalyst contains metal in the M(II) form such as zinc, nickel, manganese, lead, cadmium, calcium, magnesium or copper. Examples of the organic synthesis reactions include halogenations, electrophilic reactions, cycloadditions, transesterification reactions and coupling reactions, among others.
摘要:
Insect pheromones and pheromone precursors, containing one or more Z-alkenyl groups, are prepared by treating an alkyne with a copper complex, reducing agent, and proton donor in an organic solvent. The pheromones and pheromone precursors are prepared with high stereoselectivity and substantially no over reduction.
摘要:
A method of hydrogenation utilizing a reactant gas mixture comprising a carbon oxide and a hydrogen agent, and a hydrogenation catalyst comprising a mixed-metal oxide containing metal sites supported and/or incorporated into the lattice. The mixed-metal oxide comprises a perovskite, a pyrochlore, a fluorite, a brownmillerite, or mixtures thereof doped at the A-site or the B-site. The metal site may comprise a deposited metal, where the deposited metal is a transition metal, an alkali metal, an alkaline earth metal, or mixtures thereof. Contact between the carbon oxide, hydrogen agent, and hydrogenation catalyst under appropriate conditions of temperature, pressure and gas flow rate generate a hydrogenation reaction and produce a hydrogenated product made up of carbon from the carbon oxide and some portion of the hydrogen agent. The carbon oxide may be CO, CO2, or mixtures thereof and the hydrogen agent may be H2. In a particular embodiment, the hydrogenated product comprises an alcohol, an olefin, an aldehyde, a ketone, an ester, an oxo-product, or mixtures thereof.