8results about "Functional group formation/introduction" patented technology

The invention relates to a method for purifying a thermoplastic material (22), such as polyethylene terephthalate (PET), comprising the steps of: - supplying pellets or shreds of the thermoplastic material into a melt processing device (20); and - melting the thermoplastic material to form a polymer melt; wherein the method further comprises a step of: - adding a pro-degradant into the pellets or shreds of the thermoplastic material, and / or into the polymer melt, to selectively degrade at least polyvinyl chloride (PVC) and benzene impurities, and / or any intermediate degradation product formed by or leading to the formation of such impurities, contained within said thermoplastic material and / or said polymer melt.

The present invention provides a thionizing solution having high stability that contains a compound represented by formula (3) as a thionizing agent and a method for producing a nucleic acid molecule by the amidite method using the thionizing solution. The present invention also provides a composition containing an aromatic heterocyclic compound represented by formula (1) [in the formula, X1 to X5 each independently are the same or different and represent a hydrogen atom, etc.], an aromatic hydrocarbon compound represented by formula (2) (in the formula, Y1 to Y6 each independently are the same or different and represent a hydrogen atom, a C1-C5 alkyl group, or a halogen atom.), and a thionizing agent represented by formula (3).

The present disclosure provides a thiolation solution, and a production method of a nucleic acid molecule by the amidite method using the thiolation solution. The present invention also provides a composition which comprises an aromatic heterocyclic compound, an aromatic hydrocarbon compound, and a thiolating agent.

The application relates to a preparation method and application of an N-trifluoromethyl diarylamine compound. A diarylamine compound is used as raw material, under the action of silver trifluoromethane thiol, through the promoting action of sodium bromide, an N-thiofluoromethyl formic diarylamine intermediate is prepared through an amido N-H acylation reaction; then, silver fluoride is added in the original chemical environment of the intermediate, and desulfurization fluorination reaction occurs under the action of the silver fluoride, and finally, the target product N-trifluoromethyl diarylamine compound is obtained. The method establishes the continuous reaction of N-thioformic fluorination of the diarylamine compound and desulfurization fluorination of silver fluoride in the same chemical system by using silver trifluoromethane thiol promoted by sodium bromide, realizes two-step one-pot direct synthesis of the N-trifluoromethyl diarylamine compound, and has the advantages of simple operation, mild reaction condition, high yield and the like, and good compatibility for sensitive functional groups and complex molecular structures.

New routes for sulfoximine functionalization are described herein, including routes for N-alkylation and N-arylation of sulfoximines. Methods described herein employ benign and abundant starting materials, such as aliphatic alcohols, aryl halides, and aliphatic carboxylates, while delivering a broad range of differentially substituted, complex, functional sulfoximines in desirable yields. Further, methods described herein can accommodate sophisticated molecular scaffolds, such as existing and contemplated drug molecules, as the alkyl or aryl fragments, resulting in highly elaborate functionalized sulfoximine products.

This invention discloses a method for preparing aryl carboxylic acids by reacting aryl thioonium salts with carbon dioxide using a copper compound as a catalyst and diethylzinc as a reducing agent. The aryl thioonium salt substrate is reacted with an organic solvent at room temperature under a carbon dioxide atmosphere at one atmosphere. The product is then acidified and purified to obtain the aryl carboxylic acid. This method uses readily available raw materials, is simple to operate, operates under mild conditions, and exhibits good functional group tolerance and substrate versatility. This method can not only synthesize various simply substituted aryl carboxylic acids but can also be used for the late-stage carboxylation modification of complex drug molecules. The practicality of this method has also been verified on a gram-scale, demonstrating promising prospects for industrial application.

This invention discloses a viologen-anthraquinone-based porous ionic framework, its preparation method, and its photocatalytic application. Its chemical structure is shown in Formula 1. The preparation method includes the following steps: (1) using 4,4'-bis(2-bromoacetyl)biphenyl and 4,4'-bipyridine as raw materials, a viologen ionic linear polymer precursor VIP-Br is synthesized via a quaternization reaction; (2) using the above VIP-Br and disodium anthraquinone-2,6-disulfonate as raw materials, a viologen-anthraquinone-based porous ionic framework VAQ-PIN is prepared by ionic self-assembly in an aqueous phase at room temperature. This method is green, simple, and operates under mild conditions. The obtained VAQ-PIN can be used as a heterogeneous photocatalyst, exhibiting excellent photocatalytic activity in the photocatalytic oxidative coupling reaction of benzylamine. Formula 1

The utility model relates to carbonate solvent production device, concretely is a kind of waste heat utilization system for carbonate production device, including carbonate device, second type lithium bromide absorption heat pump unit, expansion compressor unit and hot water circulation system, and heat exchanger is provided in rectifying column top of carbonate device, after heat exchange with column top material steam in heat exchanger, circulating water enters second type lithium bromide absorption heat pump unit, and circulating water after cooling flows back to heat exchanger;Second type lithium bromide absorption heat pump unit uses the heat of circulating water to produce steam exhaust gas, steam exhaust gas enters expansion compressor unit and produces low-pressure steam;High-pressure steam of outside is connected into expansion compressor unit and produces medium-pressure steam.The application recovers the vaporization latent heat of carbonate production device top by high efficiency, not only reduces the additional energy demand, also reduces tower top cooling water consumption, achieves the energy-saving purpose of rectification process.