28results about "Organic isomerisation" patented technology

The invention provides a preparation method of high all-trans vitamin A. The reaction liquid continuously passes through a fixed bed-kettle series reactor loaded with a catalyst to carry out isomerization reaction, so that a vitamin A 11-cis-isomer and a vitamin A 9-cis-isomer can be efficiently converted into all-trans vitamin A, the isomerization selectivity is improved, and the yield of the all-trans vitamin A is improved. And the problem of excessive VA conversion in actual production is effectively solved.

A ligand which contains arsenic and has the formula (I): where n is 2 and the ligand is bidentate; each X is O or NH; and Ar1 and Ar2 may be the same or different and each is an aryl group, provided that each Ar1 group connected to the same As atom may be combined to form a single aryl group.

This cis-isomerization method is a method for cis-isomerizing a carotenoid compound, and comprises a suspension preparation step S1, a light irradiation step S2, and a residual particle removal step S3. In the suspension preparation step S1, a suspension containing particles of the carotenoid compound dispersed in a solvent is prepared. In the light irradiation step S2, the suspension prepared in the suspension preparation step S1 is irradiated with pulse laser light to cis-isomerize particles of the carotenoid compound dispersed in the solvent and dissolve the particles in the solvent. In the residual particle removal step S3, particles remaining and dispersed in the solvent are removed. According to the method, it is possible to realize a cis-isomerization method that allows cis-isomerization of a carotenoid compound in a short time and with high efficiency.

To provide a method for generating isobutene, for use in isomerizing normal butene to isobutene, in which the generation of by-products can be minimized, and a high yield of isobutene can be achieved.SOLUTION: A method for generating isobutene includes the step of isomerizing normal butene to isobutene. In the isomerizing step, the normal butene is brought into contact with a basic catalyst. It is preferable that the reaction temperature in the isomerizing step should range 25°C to 249°C.SELECTED DRAWING: Figure 2

A ligand which contains arsenic and has the formula (I): where n is 2 and the ligand is bidentate; each X is O or NH; and Ar1 and Ar2 may be the same or different and each is an aryl group, provided that each Ar1 group connected to the same As atom may be combined to form a single aryl group.

This invention utilizes mechanical vapor compression and / or thermal vapor compression, integrating compression loops across multiple process stages. A sequential network of compressors is used to increase the pressure and condensation temperature of vapor within each process stage as an internal vapor flow, and as an inter-vapor flow branching between process stages. Because available vapor is shared between compressor stages, the number of compressors can be reduced, improving economics. By separating vapor between compressor stages to balance the vapor mass flow rate across multiple process stages in the incremental compressor stages, the entire vapor compression system can be customized to individual process energy requirements and adapt to dynamic fluctuations in process conditions.

To provide a method for generating isobutene, for use in isomerizing normal butene to isobutene, in which the generation of by-products can be minimized, and a high yield of isobutene can be achieved.SOLUTION: A method for generating isobutene includes the step of isomerizing normal butene to isobutene. In the isomerizing step, the normal butene is brought into contact with a zeolite. It is preferable that the reaction temperature in the isomerizing step should range 25°C to 249°C.SELECTED DRAWING: Figure 3

A production method of producing a fluorine-containing olefin by allowing a first olefin represented by the following Formula (1) and a second olefin to react with each other in the presence of a ruthenium compound represented by the following Formula (X) is provided.

Provided herein are nano-emulsion compositions comprising a cannabinoid, a solvent, a lipid source, and a surfactant. Methods of making the nano-emulsion compositions and methods of use are also provided herein. Compositions comprising the nano-emulsion compositions, such as food and beverage compositions and topical compositions, are also provided herein.

Polymeric compounds comprising chitosan polymers bound to trehalose molecules are disclosed, along with methods for their synthesis involving Schiff base formation, reduction, and transacetalization. Compositions include the polymers in buffered acidic solutions for seed coating. Methods encompass coating seeds to promote development in crops like chickpea, wheat, barley, corn, soybean, sunflower, Egyptian riverhemp, yellow mustard, triticale, sainfoin, and common vetch, improving germination, biomass, and pigments. Further methods integrate growth-promoting bacteria to enhance viability, nodulation, and symbiosis. The compounds and compositions of the disclosure mitigate abiotic stresses, such as salinity.

The invention relates to a method for regioselectively and stereoselectively synthesizing internal olefin, in particular to an olefin isomerization method which is simple and convenient to operate and comprises the following steps: under the condition that a catalyst A is K < + > [O = X (R) R '], olefin generates Z-configuration 2-olefin, intracyclic olefin or intracyclic bridged cycloolefin in a high stereoselectivity manner under the condition of an activating reagent; 1-olefin such as allyl arene and butyl-1-alkenyl arene is used as a raw material for isomerization, and the E-configuration aryl alkene compound is generated with high stereoselectivity; an E / Z-configuration aryl ethylene mixture and Z-configuration aryl ethylene olefin are used as raw materials for isomerization, and the E-configuration aryl olefin compound is generated with high regioselectivity. The method has the characteristics of high efficiency, mild reaction conditions, high purity of product isomers, easiness in separation and the like, is an environment-friendly and efficient internal olefin production scheme, and has very high industrial application prospects.

The invention discloses a double-bond isomerization catalyst, a preparation method thereof and a double-bond isomerization method, and belongs to the technical field of organic chemical engineering, cinchona alkaloid in the catalyst can promote allylic deprotonation of coordinated olefin so as to accelerate the reaction process, and also can be used as a ligand to be coordinated with a metal atom vanadium to form a complex to act on a substrate, so that the reaction efficiency is improved. The catalyst has double functions of base catalysis and metal catalysis, so that the catalyst has the characteristic of high activity; the magnetic Fe3O4 nanoparticles are adopted as the carrier, so that more active sites can be dispersed on the surface of the catalyst; the cinchona alkaloid is loaded, so that the usage amount is reduced, and recycling of the cinchona alkaloid and separation and purification of a product are facilitated; the double-bond isomerization catalyst is used in double-bond isomerization synthesis, and has the advantages of high reaction catalysis efficiency, short reaction time, high catalytic activity, good selectivity and high yield; the reaction system is a solvent-free system, the post-treatment is simple, and the solvent recovery cost is reduced.

An improved process for the industrial production of (4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-1,4-dihydro-2,8-dimethyl-1,6-naphthyridine-3-carboxamide, a compound commonly known as Finerenone, having the formula below, is described: Finerenone

Provided is a method capable of producing (E)-1,1,1,4,4,4-hexafluoro-2-butene at a high yield even with a catalyst containing alumina having a large sodium content. The method for producing (E)-1,1,1,4,4,4-hexafluoro-2-butene includes an isomerization step of bringing (Z)-1,1,1,4,4,4-hexafluoro-2-butene into contact with a catalyst containing alumina to isomerize the (Z)-1,1,1,4,4,4-hexafluoro-2-butene to (E)-1,1,1,4,4,4-hexafluoro-2-butene. The alumina is a porous body having a plurality of pores and having a central pore size of 5 nm or more and 40 nm or less. The proportion of the total volume of pores having a pore size of not less than -50% and not more than +50% of the central pore size, of all the pores of the porous body, to the total pore volume of the porous body is 70% or more.

The present application discloses a double-bond isomerization catalyst, a preparation method thereof, and a double-bond isomerization method, which belong to the technical field of organic chemical industry. The cinchona alkaloid in the catalyst can promote the allylic deprotonation of coordinated olefins, thereby accelerating the reaction process. It can also act as a ligand to coordinate with metal atom vanadium to form a complex and act on the substrate, having both base-catalysis and metal-catalysis dual functions, making the catalyst exhibit high activity characteristics. Using magnetic Fe3O4 nanoparticles as the carrier is conducive to the dispersion of more active sites on the surface of the catalyst. Loading the cinchona alkaloid not only reduces the usage amount but also facilitates its recycling and the separation and purification of products. When the double-bond isomerization catalyst is used in the synthesis of double-bond isomerization, the reaction has high catalytic efficiency, short reaction time, high catalytic activity, good selectivity, and high yield. The reaction system is a solvent-free system, with simple post-treatment and reduced solvent recovery cost.

A process for the hydrocyanation of an organic compound containing at least one olefinic group comprising reacting the organic compound with hydrogen cyanide in the presence of a catalyst complex comprising a bidentate phosphite ligand having one of the following structures:(I) and (II) and at least one transition metal.

Compound of formula 4 or formula 5 wherein L is a neutral ligand, preferably a nitrogen-containing heterocyclic carbene (NHC) such as carbene containing at least two nitrogen atoms, a cyclic aminoalkyl carbene (CAAC) or a bicyclic aminoalkyl carbene (BICAAC); R1, R3, R4, R5, R6, R7, R8, R9, R10 and R11 are, independently, H, unbranched or branched C1-20 alkyl, C5-9 cycloalkyl, unbranched or branched C1-20 alkoxy, optionally bearing one or more halogen atoms, respectively; or aryl, optionally substituted with one or more of unbranched or branched C1-20 alkyl, C5-9 cycloalkyl, unbranched or branched C1-20 alkoxy, aryl, aryloxy, unbranched or branched C1-20 alkylcarbonyl, arylcarbonyl, unbranched or branched C1-20 alkoxycarbonyl, aryloxycarbonyl, heteroaryl, carboxyl, cyano, nitro, amido, aminosulfonyl, N-heteroarylsulfonyl, unbranched or branched C1-20 alkylsulfonyl, arylsulfonyl, unbranched or branched C1-20 alkylsulfinyl, arylsulfinyl, unbranched or branched C1-20 alkylthio, arylthio, sulfonamide, halogen or N(Ry)(Rz), wherein Ry and Rz are independently selected from H and C1-20 alkyl: R2 is H, unbranched or branched C1-20 alkyl.

This invention relates to a method for molecular isomerization based on perovskite nanocrystals (CsPbBr3) sensitization. The system uses a perovskite nanocrystal-organic molecule hybrid system as the sensitizer, and utilizes visible light excitation to achieve isomerization of trans-stilbene molecules and their derivatives via triplet energy transfer. Under irradiation with a 450 nm continuous-wave laser (CW laser) at a power of 2.7 W, a conversion rate of >75% can be achieved in ~30 s. With low-power (5 mW) excitation, a quantum efficiency as high as ~30% can be obtained.

A production method of producing a fluorine-containing olefin by allowing a first olefin represented by the following Formula (1) and a second olefin to react with each other in the presence of a ruthenium compound represented by the following Formula (X) is provided.

To provide a method for producing a fluorine-containing olefin that enables the fluorine-containing olefin to be produced at high yield.SOLUTION: The present invention provides a production method for producing a fluorine-containing olefin, comprising reacting a fluorine-containing first olefin and a second olefin with each other in the presence of a ruthenium compound represented by the following formula (X).SELECTED DRAWING: None

PCNHCP pincer metal complexes are useful as catalysts in various chemical reactions such as hydrogen isotope exchange (HIE) in C(sp3)-H and / or C(sp2)-H bond of an organic compound, e.g., a pharmaceutically active compound. The complexes are also useful in hydroboration of alkynes with excellent selectivity; and alkene isomerization with high stereo- and regioselectivity.

This invention provides a cis-isomerization method that can efficiently and quickly cis-isomerize carotenoid compounds. [Solution] The cis-isomerization method is a method for cis-isomerizing a carotenoid compound, comprising a suspension preparation step S1, a light irradiation step S2, and a residual particle removal step S3. In the suspension preparation step S1, a suspension is prepared by dispersing carotenoid compound particles in a solvent. In the light irradiation step S2, pulsed laser light is irradiated onto the suspension prepared in the suspension preparation step S1 to cis-isomerize the carotenoid compound particles dispersed in the solvent and dissolve them in the solvent. In the residual particle removal step S3, particles remaining dispersed in the solvent are removed.

A process for the hydrocyanation of an organic compound containing at least one olefinic group comprising reacting the organic compound with hydrogen cyanide in the presence of a catalyst complex comprising a bidentate phosphite ligand having one of the following structures: (I) and (II) and at least one transition metal.

The invention discloses a method for preparing a racemic structure through isomerization conversion of a bridged double metallocene catalyst. According to the method, a meso-structural body raw material containing the bridged double-metallocene catalyst, an ether solvent and a catalyst are mixed and react to obtain a rac-structural body of the bridged double-metallocene catalyst. According to the method, the high-purity rac-structural body can be obtained, and the byproduct meso-structural body is effectively utilized, so that the yield and yield of the rac-structural body are improved, and the product can be directly used for preparing the bridged double metallocene catalyst.

A ligand which contains arsenic and has the formula (I): where n is 2 and the ligand is bidentate; each X is O or NH; and Ar1 and Ar2 may be the same or different and each is an aryl group, provided that each Ar1 group connected to the same As atom may be combined to form a single aryl group.

The invention discloses a synthesis method and application of beta, gamma-dehydroamino acid and derivatives thereof, and belongs to the technical field of organic synthesis. The invention finds that TBADT as a photocatalyst can realize olefin position isomerization of alpha, beta-unsaturated amino acids which are convenient and easy to synthesize, so that efficient selective synthesis of a series of beta, gamma-dehydroamino acids and derivatives thereof is realized. The method has the advantages of mild reaction conditions, wide substrate range, strong functional group tolerance, easily available raw materials and the like.