10 results about "Carbanion" patented technology

The invention provides a bissanthin aromatic ring bay region C-H nucleophilic substitution reaction method and application thereof, and belongs to the field of organic synthesis methodology. According to the reaction, bissanthin is used as a raw material, dichloromethane and acetonitrile are used as solvents, and the bissanthin is oxidized by nitrite hexafluorotellurate and respectively reacts with nucleophilic reagents such as carbon anions, oxygen-containing reagents, sulfur-containing reagents, chlorine-containing reagents, nitrogen-containing reagents, phosphorus-containing reagents and cyano groups in one step to synthesize a series of bissanthin bay area modified functionalized products; when the reaction method is further applied to the nucleophilic substitution reaction of two molecules, namely perylene (Perylene) and N, N '-di (1, 3-diisopropyl benzene)-3, 4, 9, 10-perylene dicarboximide (PDI), good universality is shown, and the reaction method can be applied to the nucleophilic substitution reaction of two molecules, namely perylene (Perylene) and N, N'-di (1, 3-diisopropyl benzene)-3, 4, 9, 10-perylene dicarboximide (PDI). The method is mild in reaction condition, does not need to introduce transition metal as a catalyst, is easy in product separation and purification, and has the advantages of low cost, high efficiency and greenness; the series of functionalized derivatives constructed by the method can provide important intermediates for synthesis of larger polycyclic aromatic hydrocarbon molecules of the system; the method has a good industrial production prospect.

A functionalized diene polymer having at least one first functional group and at least one second functional group, wherein the first functional group is selected from end groups, side groups, and combinations thereof, the second functional group is an end group, the first functional group comprises at least one unit derived from a functionalized monomer represented by formula (1) (wherein R1, R2, and R3 are selected from hydrogen and methyl, provided that at least one of R1, R2, and R3 is hydrogen, preferably R1, R2, and R3 are all hydrogen, n is 1, 2, 3, 4, or 5, each R4 is independently selected from aliphatic residues or arylaliphatic residues having 3 to 30 carbon atoms, and R4 contains at least one tertiary amine group when n = 1, and at least one of the residues R4 contains at least one tertiary alkylamine group when n = 2 to 5); or (ii) the first functional group is obtained by using a polymerization initiator of the general formula: N(R1)(R2)(R3M) (wherein R1 and R2 are the same or different from each other and are selected from linear or branched saturated alkyls, R3 is a saturated, linear or branched alkyl carbanion, and M is an alkali cation), the second functional group is an end group, and comprises at least one group selected from -COOX; -OX; -SX (wherein X represents hydrogen or a cation), a plurality thereof, and combinations thereof. Also provided are a method for producing the polymer, an article obtained from the polymer, and a method for producing an article with the polymer, wherein the functionalized diene polymer is a homopolymer or copolymer of a conjugated diene, and the conjugated diene is selected from the group consisting of butadiene, isoprene, isoprene, 1,3-pentadiene, 2,3-dimethylbutadiene, 1-phenyl-1,3-butadiene, 1,3-hexadiene, preferably butadiene.

The present invention relates to the use of a compound as a collector for the selective flotation of lithium minerals, characterized in that the compound is represented by the formula (1): AB (1); wherein A is a) an aromatic group substituted by one or more OH and / or SH groups, or b) an aromatic group attached to B via a methylene group of the formula -[CH2]- or a methylene carbanion group of the formula -[CH -]-; wherein B is i) a pyridinium or benzoannelated pyridinium compound, wherein A is bonded to the nitrogen atom of the pyridinium or benzoannelated pyridinium compound, or ii) a substituted or unsubstituted pyridyl or benzoannelated pyridyl group; wherein the selective flotation of lithium minerals is carried out using a conditioning time CT ≥ 3 min, preferably > 5 min, more preferably > 10 min, and / or wherein the selective flotation of lithium minerals is carried out at a temperature ≤ 10°C or ≥ 25°C, preferably ≤ 5°C or ≥ 40°C. The present invention further relates to a flotation composition comprising said compound as a collector and a flotation process using said compound as a collector.

The present invention provides a chain-functionalized perfluoropolyether and a preparation method thereof. The preparation method includes: S1, mixing a double-ended hydroxyl perfluoropolyether and an oxidation reagent, reacting at 60-120 °C for 1-72 h to obtain an oxidation product, and mixing the oxidation product with an alcohol to obtain a first intermediate product; S2, mixing an acetyl compound, a hydrogen abstraction reagent, and an ether solvent, reacting to obtain a second intermediate product containing a carbanion; S3, mixing the first intermediate product and the second intermediate product, reacting, and separating the product to obtain a chain-functionalized perfluoropolyether. The elastomer prepared from the chain-functionalized perfluoropolyether provided by the present invention has good low-temperature resilience.

The present invention discloses a method for synthesizing deuterated carboxylic acid compounds by electrochemical defluorination, wherein SP 3 The fluorinated compound on C is mixed with an electrolyte, and then defluorinated by the ability of cathode reduction under the action of direct current electrolysis, reducing to obtain a carbon anion, which is then attacked by carbon dioxide nucleophilically to synthesize various carboxylic acid compounds; or deuterated water is introduced while carbon dioxide nucleophilically attacks to synthesize deuterated carboxylic acid compounds. The present invention adopts a cathode electrochemical reduction method, avoiding the use of expensive photosensitizers and only requiring a short reaction time to achieve product generation. At the same time, in the presence of deuterated water, selective generation of carboxylic acid compounds substituted with different deuterium atoms can be achieved. The operation is simple, the reaction is controllable, and most importantly, this method can better achieve large-scale reaction amplification under the condition of increasing the current, with potential application value.

The present application relates to a Michael Addition curable composition, coating composition containing the same and coated article made therefrom. In particular, the Michael Addition curable composition comprises at least one reactive donor capable of providing two or more nucleophilic carbanions; at least one reactive acceptor comprising two or more carbon-carbon double bonds; and at least one catalyst for catalyzing a Michael Addition crosslinking reaction between the at least one reactive donor and the at least one reactive acceptor, wherein the at least one reactive donor comprises at least one branched polyester comprising at least one polyester backbone and at least one —C(O)—CH2—C(O)-moiety; wherein the at least one polyester backbone is derived from an alcohol component comprising at least one alcohol having at least three hydroxyl groups; and wherein the at least one branched polyester has a —C(O)—CH2—C(O)-moiety equivalent of no more than 700 g / mol.

The application provides a method for preparing dienogest by one-pot method, and belongs to the technical field of drug synthesis. The reaction formula of the method is as follows: the method comprises the following steps: under the condition of ultralow temperature, ethynyl carbanion is formed by n-butyllithium and acetonitrile, addition reaction is carried out on a compound of formula (1), after the reaction is completed, an acid is used for quenching, then concentrated hydrochloric acid is directly added dropwise for deprotection-transposition reaction, a compound of formula (2) is prepared; after the reaction is completed, sodium bicarbonate aqueous solution is added for water analysis, and dienogest fine product is obtained by secondary refining of the obtained crude product. The dienogest is prepared by the addition reaction, deprotection-transposition reaction one-pot method, solvent consumption can be effectively reduced, solid waste can be reduced, process cost can be reduced, and green chemical industrial production of dienogest can be realized.

In one aspect, the disclosure relates to a method for the in situ generation of formaldehyde for the hydroxymethylation of difluoroenolates to create 2,2-difluoroethanols having a range of solubilities, acidity, basicity, and other physical properties. The method also allows the production of formaldehyde-d2 for hydroxy deuteromethylations and constitutes a new synthetic method for 2,2-difluoro-1,1-deuteroethanols. In one aspect, disclosed method is compatible with α,α-difluorobenzyl carbanions generated from the release of trifluoroacetate from electron-deficient aromatic and heteroaromatic rings and can be conducted under mild conditions with high yields. Also disclosed herein are 2,2-difluoroethanols generated by the disclosed method and methods of using the 2,2-difluoroethanols as solvents or co-solvents for organic synthesis, metal catalyzed reactions, asymmetric processes, carbohydrate chemistry, and medicinal chemistry.

The present invention provides a method for the C-H nucleophilic substitution reaction of the bisanthene aromatic ring bay area and its application, belonging to the field of organic synthesis methodology. This reaction uses bisanthene as the raw material, dichloromethane and acetonitrile as solvents, and is subjected to nitrosylation with hexafluorotellurous acid, and reacts with nucleophilic reagents such as carbanions, oxygen-containing, sulfur-containing, chlorine-containing, nitrogen-containing, phosphorus-containing and cyano groups in one step to synthesize a series of functionalized products modified in the bisanthene bay area; when this reaction method is further applied to the nucleophilic substitution reactions of perylene and N,N'-bis(1,3-diisopropylbenzene)-3,4,9,10-perylene diimide (PDI), it shows good generality. The reaction of the present invention has mild reaction conditions, does not require the introduction of a transition metal as a catalyst, the product is easy to separate and purify, and has the advantages of low cost, high efficiency and greenness; the series of functionalized derivatives constructed by this method can provide important intermediates for the synthesis of larger polycyclic aromatic hydrocarbon molecules in the system; this method has good industrial production prospects.

This article describes metal complexes and their preparation and use. In some forms, metal complexes contain C NHC ^C^C NHC (NHC=N-heterocyclic carbene) clamp ligands with a through-bonded donor-acceptor configuration. The donor (e.g., an amide group) is coordinated to a metal ion, while the acceptor (e.g., 2,4,6-triphenyl-1,3,5-triazine and its derivatives) is incorporated into the clamp ligand and located at the para position of the carbanion. In some forms, the incorporation of the acceptor (e.g., 2,4,6-triphenyl-1,3,5-triazine and its derivatives) can be applied to clamp ligands N^C^N and / or C^C^N, wherein in the metal complex, C... NHC ^C^C NHC ligand donor C NHC It can be replaced with a neutral N- donor and / or a carbanion. The design of the metal complexes disclosed herein can lead to improved photophysical properties, such as a shortened emission lifetime and / or an increased radiative decay rate constant, thereby improving their device performance in OLED devices.