4 results about "Carbanion" patented technology

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.

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.