11 results about "Oxazolidine E" patented technology

The invention discloses a benzoxphosphine ligand and a complex and application thereof. The structure of the benzoxphosphine ligand is shown as a formula (I), in the formula (I), R1 is alkyl or aryl substituted oxazolidinyl or imidazoline, R2 is alkyl and / or aryl, and R3 is at least one of fluorine, carbazolyl and 2, 6-dimethoxyphenyl. According to the benzoxphosphine ligand disclosed by the invention, the metal iridium complex can be used as a catalyst to be applied to an asymmetric hydrogenation reaction of alpha-phenyl vinyl diethyl phosphate, and has excellent activity and relatively high enantioselectivity; moreover, the benzoxphosphine ligand disclosed by the invention can be directly synthesized from simple and easily available chiral aldehyde, and the preparation method is simple and easy to operate.

The invention discloses a preparation method of an azacyclo-bis (fluorosulfonyl) imide salt derivative, which comprises the following steps of: 1, mixing an azacyclo-compound, a methylation reagent, an ethylation reagent, bis (fluorosulfonyl) imide salt and inorganic alkali in a polar organic solvent, heating, and filtering after complete reaction to obtain crude filtrate containing the azacyclo-bis (fluorosulfonyl) imide salt; the nitrogen heterocyclic compound is selected from one of oxazolidine, 4-cyano piperidine, 4-fluoro piperidine, 4, 4-difluoro piperidine and 3-cyano piperidine; the bis (fluorosulfonyl) imide salt is selected from one of lithium bis (fluorosulfonyl) imide and potassium bis (fluorosulfonyl) imide; and 2, adding an inert organic solvent into the crude product filtrate for crystallization, and performing vacuum drying to obtain a finished product. The method has the advantages that the operation steps are few, the synthesis efficiency is greatly high, the process is greatly simplified, and the preparation cost is effectively reduced.

The invention relates to the technical field of shoe materials, in particular to shoe material sponge applied to shoes easy to wear and take off and a preparation method of the shoe material sponge. The shoe material sponge is prepared from the following raw materials in parts by weight: 70 to 80 parts of polyether polyol, 10 to 17 parts of polyester polyol, 3 to 8 parts of a chain extender, 5 to 12 parts of thiolated nano silicon dioxide, 0.3 to 0.8 part of a Grubbs catalyst, 3 to 10 parts of self-repairing microcapsules, 1 to 3 parts of an oxazolidine crosslinking agent, 1 to 2.5 parts of a foaming agent, 0.05 to 0.2 part of a catalyst, 1 to 2 parts of a foam stabilizer and 40 to 60 parts of isocyanate. The core material of the self-repairing microcapsule is dicyclopentadiene; the method has the advantage that the fatigue resistance of the sponge for the shoe material is improved.

The invention provides a novel carrier-free catalysis strategy, the in-situ carboxylation cyclization reaction of ultralow-concentration carbon dioxide and propargylamine is realized by utilizing low-cost silver carbonate under the conditions of normal temperature and normal pressure, and the oxazolidinone compound with important industrial value is efficiently synthesized. The catalytic system not only can efficiently convert carbon dioxide in a low concentration range of 5 vol.% to 35 vol.%, but also can directly convert carbon dioxide as low as 0.04 vol.% in air to generate oxazolidinone, the highest yield can reach 97%, and good substrate applicability is shown. By constructing a circular reaction device, the concentration of carbon dioxide in simulated gas can be reduced from 15 vol.% to 3 vol.%, and meanwhile, the average yield of oxazolidinone is maintained to reach 92%.

The application provides a method for synthesizing oxazolidinone compounds based on carbon dioxide and alcohol amine, a catalyst, oxazolidinone compounds prepared based on carbon dioxide and alcohol amine, and application of cerium-based composite oxides in preparation of oxazolidinone compounds based on carbon dioxide and alcohol amine. The method comprises the following steps: taking carbon dioxide and alcohol amine as raw materials, and allowing the alcohol amine to react with the carbon dioxide under the action of a solid catalyst to generate the oxazolidinone compounds; wherein the solid catalyst comprises cerium-based composite oxides, and the reaction process comprises liquid-phase carboxylation and cyclization dehydration. The method provided by the application can easily separate the catalyst from the product, and can make the alcohol amine have a high conversion rate.

This invention provides a method for synthesizing 3-cinnamyl oxazolidine-2-one derivatives. The method provided by this invention is a one-step synthesis of 3-cinnamyl oxazolidine-2-one derivatives. Compared with commonly used methods, it requires only one step to obtain the product and requires less catalyst, thus enabling a more efficient and environmentally friendly method to obtain the corresponding product.

The application discloses a high-reliability aluminum electrolytic capacitor and a preparation method thereof. The aluminum electrolytic capacitor comprises a core package and an electrolyte immersed in the core package. The electrolyte comprises, in terms of mass parts, 30-50 parts of an organic solvent, 10-20 parts of a composite lithium salt, 5-15 parts of an additive, and 0.05-0.15 parts of an electrolyte. The additive comprises 0.01-0.1 parts of oxazolidine and 0.48-0.51 parts of polyethylene glycol dimethyl ether. The application optimizes the electrolyte formula, introduces oxazolidine and polyethylene glycol dimethyl ether as key additives, and cooperates with the composite lithium salt, the organic solvent and the electrolyte, thereby significantly improving the anti-vibration performance and high-temperature load performance of the aluminum electrolytic capacitor. After the vibration test, the capacitance change rate can be controlled within ±0.2%. After the high-temperature load test, the capacitance attenuation amplitude is small, and the DF value and ESR remain stable. The application is particularly suitable for application scenarios with strict reliability requirements and has a wide market application prospect.

The present application relates to a kind of 2-oxazolidinone-3-carbamimidate-5-methylene derivatives and preparation method thereof, belong to organic synthesis technical field.The structure of 2-oxazolidinone-3-carbamimidate-5-methylene derivatives provided in the present application is as shown in formula (I)-(III).2-Oxazolidinone-3-carbamimidate-5-methylene derivatives of the present application can be applied to the synthesis and activity screening of novel oxazolidinone antibiotics, can provide technical support for the further derivatization and biological activity research of 2-oxazolidinone-3-carbamimidate derivative compound, with wide application prospect.

The application belongs to the technical field of electrolyte, and particularly relates to an electrolyte and a secondary battery. The electrolyte comprises a water removal and acid suppression additive, and the mass percentage of the water removal and acid suppression additive is 0.05% to 2.2% based on 100% of the total mass of the electrolyte. The water removal and acid suppression additive comprises a compound with a structure shown in Formula II and a compound with a structure shown in Formula III. The compound with the structure shown in Formula II is 3-ethyl-2-methyl-2-(3-methylbutyl)-1,3-oxazolidine, and the compound with the structure shown in Formula III is 3-butyl-2-(1-ethylpentyl)-1,3-oxazolidine. The mass ratio of the compound with the structure shown in Formula II to the compound with the structure shown in Formula III is (1:2) to (1:4). The compound with the structure shown in Formula II and the compound with the structure shown in Formula III are compounded in a ratio of (1:2) to (1:4), so that the overall performance of the additive can be synergistically optimized. The compound with the structure shown in Formula II provides a rapid initial acid suppression response, and the compound with the structure shown in Formula III ensures long-term protection, so that a long-term cycle from formation to long-term cycle of the battery is covered.

The application discloses a kind of ( R )‑4‑isopropyl‑3‑(( R )‑2‑methyl‑5‑hexenoyl) oxazolidine‑2‑ketone and application in synthesis western hemlock looper sex pheromone component, it relates to the technical field of biological pesticide.The application utilizes ( R )‑4‑isopropyl‑3‑(( R )‑2‑methyl‑5‑hexenoyl) oxazolidine‑2‑ketone synthesis (5 R ,11 S )‑5,11‑dimethyl heptadecane, total yield can reach 18%, and (5 R ,11 S )‑5,11‑dimethyl heptadecane optical purity is greater than 99%;The application utilizes ( R )‑4‑isopropyl‑3‑(( R )‑2‑methyl‑5‑hexenoyl) oxazolidine‑2‑ketone synthesis ( S )‑7‑methyl heptadecane, total yield can reach 30%, and (5 R ,11 S )‑5,11‑dimethyl heptadecane optical purity is greater than 99%.

The application discloses a kind of di-substituted phosphite and 2-(oxazolidine-3-yl)ethanol derivatives, and preparation method and application thereof.The core step of the method involves mixing catalyst with 2-(oxazolidine-3-yl)ethanol, then gradually adding phosphite compound within the reaction temperature range of 65-70℃, after dropwise addition is completed, the system is reacted at 65-70℃ for 1-10 hours, by adding appropriate amount of propylene oxide to neutralize the acid produced in the reaction until the acid value is reduced to below 5mgKOH / g, so as to ensure the chemical stability of the product;The reaction mixture is distilled under reduced pressure to remove unreacted raw materials and low-boiling impurities, and further purified by fine filtration to obtain high-quality di-substituted phosphite and 2-(oxazolidine-3-yl)ethanol derivative flame retardant.The preparation method of the application not only has simple and clear process design, simple and fast operation process, but also has mild reaction condition, can be efficiently completed without extreme condition, and the catalyst used can be repeatedly used.