12 results about "Sulfinic acid" patented technology

The application relates to the technical field of organic synthesis, and discloses an organic sulfinate salt composition, a preparation method and application thereof and the composition. The preparation method comprises the following steps: contacting a monovalent organic sulfinate salt shown in formula I with a divalent metal salt or a salt of a metal with a valence higher than two under the condition that a poor solvent exists; the organic sulfinate salt prepared by the method has high yield and high purity, almost no sulfinate salt by-product is generated, the method has the advantages of simple operation, safe and easily-obtained reaction raw materials, rapid reaction, no need of recrystallization, the target product can be obtained through filtration after the reaction, less solvent is used, the cost is low, etc., the composition has the beneficial effects that the composition is more stable than a corresponding sodium salt, the sulfur odor is reduced, the composition has strong reducing capacity, etc.

This invention provides an alkali-generating agent and a curable resin composition that exhibit excellent storage stability in a liquid, high catalytic activity at the desired curing temperature, and induce a curing reaction in a short time. An alkali-generating agent comprises a pyridinium cation and an anionic residue of an organic or inorganic acid, and is represented by the following formula (a). (In formula (a), A represents a divalent hydrocarbon group with 1 to 8 carbon atoms that may contain heteroatoms; R1 to R5 independently represent hydrogen atoms or electron-donating groups; R1 and R2, R2 and R3, R3 and R4, and R4 and R5 can be bonded to form a ring structure. R6 to R5...) 10 Each of the following groups independently represents a hydrogen atom, halogen atom, hydroxyl group, alkoxy group, mercapto group, sulfide group, silyl group, silanol group, nitro group, nitroso group, cyano group, sulfinic acid group, sulfonyl group, sulfonic acid group, phosphono group, oxophosphono group, phosphonyl group, phosphonate group, amino group, or ammonium group, R6 and R7, R7 and R8, R8 and R9, R9 and R 10 They can be bonded separately to form a ring structure.

The present invention provides a double metal layered hydroxide represented by the formula [M(II) 1‑x M(III) x (OH)2] x+ (A n‑ ) x / n ·mH2O, wherein M(II) contains a divalent cation selected from at least one of Mg, Zn, Ca, Ni, Co, Cu, Fe, Mn, and Sr, M(III) contains a trivalent cation selected from at least one of Al, Fe, Cr, Co, In, Ga, and V, A n‑ contains an anion selected from at least one of CO3 2‑ , OH ‑ , F ‑ , Cl ‑ , SO4 2‑ , NO3 ‑ , PO4 3‑ , B(OH) ‑ , VO4 3‑ , MnO4 ‑ , ClO4 ‑ , a carboxylate, a sulfonate, a sulfinic acid, and a thiocarboxylate, x is 0 < x < 1, n is the valence of A, and m is a number of 0 or more, and the double metal layered hydroxide has an average particle diameter D50 of 0.3 to 1.0 μm, a BET specific surface area of 8 to 25 m 2 / g, and a crystallite size of a D003 plane of 340 to 400 angstroms.

This disclosure relates to a polishing composition comprising at least one abrasive; at least one nitride removal reducing agent; an acid or alkali; and water. The at least one nitride removal reducing agent may include C... 12 To C 40 The polishing composition comprises a hydrophobic portion of a hydrocarbon group and a hydrophilic portion containing at least one group selected from the group consisting of sulfinic acid, sulfate, sulfonic acid, carboxyl, phosphate, and phosphonic acid groups; wherein the hydrophobic and hydrophilic portions are separated by 0 to 10 epoxy alkyl groups. The polishing composition may have a pH of about 2 to about 6.5.

The present invention relates to a reducing agent, comprising: a sulfinate of formula I, wherein R1 is H or C1-C6 hydrocarbyl, R2 is C1-C6 hydrocarbyl or M', and M and M' are each independently at least one monovalent cation or a combination with at least one multivalent cation; and optionally, urea or a urea derivative. The reducing agent contains essentially no sulfonic acid or sulfonate. In addition, the present invention relates to a preparation method for the reducing agent. The reducing agent can effectively improve the properties of a polymerization product when used for emulsion polymerization and preparation of a water-soluble polymer.

The application provides a method for preparing sulfinic acid compounds, sulfinic acid salt compounds, sulfonic acid salt compounds and sulfonyl compounds through sulfinylation, comprising the following steps: under the conditions of a protective atmosphere and light, performing a sulfinylation reaction on an alkyl compound and a sulfur dioxide donor under the condition of a catalyst to obtain an alkyl sulfinic acid compound. The main catalyst comprises a metal salt, and the metal elements in the metal salt comprise one or more of Fe, Cu and Ce; the cocatalyst comprises one or more of chlorosilane, a tetraalkylammonium chloride, an alkali metal chloride and hydrochloric acid. The method in the application has high catalytic efficiency (TON>350000, TOF>50000 / h), high selectivity (the conversion selectivity of sulfinic acid is >99%), high conversion rate (sulfinic acid is close to complete conversion), and is low in cost, high in atomic economy, basically free of waste in the production process, and green, low-carbon and environmentally friendly.

The application belongs to the technical field of synthetic chemistry, and relates to an arylmethyl sulfone compound and a synthesis method thereof. The application takes an imidazopyridine compound as a reaction substrate, takes sodium sulfinate as a sulfone reagent, takes DMA as a methylene source, and directly obtains the arylmethyl sulfone compound through one-step reaction under the action of a catalyst and an oxidant. The synthesis method has the advantages of rapid reaction, low cost of raw materials, simple operation and high yield. The arylmethyl sulfone compound constructed by the application is an important skeleton of many drugs, bioactive molecules and natural products, and the synthesis method provides a widely applicable preparation method for the synthesis of the compounds.

The application discloses a method for constructing asymmetric sulfenyl sulfonate by electrochemical oxidation in an aqueous phase, which successfully realizes the construction of asymmetric sulfenyl sulfonate by electrochemical oxidation-nucleophilic substitution reaction in an aqueous phase. The reaction uses sodium sulfinate and disulfide as raw materials to efficiently synthesize asymmetric sulfenyl sulfonate compounds, and for the first time realizes the dual function of water as a solvent and a reactant. The method is carried out at room temperature, has mild reaction conditions, a simple process and easy operation, and does not need to use organic solvents, metal catalysts and chemical oxidants, thereby reducing the generation of chemical waste reagents and being more friendly to the environment. In addition, the antibacterial performance of the sulfenyl sulfonate is evaluated, and it is found that S-isopropyl 4-methyl benzene sulfenyl sulfonate shows good antibacterial activity on staphylococcus aureus and streptococcus mutans, which indicates that the method has a wide application market.

The application relates to the technical field of organic synthesis, and discloses a preparation method of an organic sulfinate salt, characterized in that the method comprises the following steps: performing a nucleophilic addition reaction by contacting a compound shown in formula I or a compound shown in formula I' with a compound shown in formula II; and the nucleophilic reagent is at least one selected from nitrogen-substituted or unsubstituted dithionous acid and esters and salts thereof. The preparation method has high yield and excellent selectivity, and no organic sulfonic acid sodium salt is generated in by-products. The solubility difference between urea in the by-products and the product sulfinate sodium salt is large, subsequent recrystallization and purification operations are simple, the solvent consumption is small, and the separation efficiency is high.

This invention provides a sulfinic acid ester compound, its preparation method, and an electrolyte thereof. The sulfinic acid ester compound has the structural formula shown in Formula I, wherein R is selected from alkylsilyl, C2-C6 aldehyde, and halogen boron groups. This sulfinic acid ester compound can form a good protective film at the interface of positive and negative electrode materials and has low internal resistance, which can improve the rate capability and low-temperature performance of the battery. It can be used as a high-performance electrolyte additive.

This invention discloses a method for preparing γ-ketone sulfone compounds. The method involves first using propargyl ester compound ( ) and sulfinic acid (II) as starting materials, dissolving them thoroughly in an organic solvent at room temperature, then adding p-toluenesulfonic acid monohydrate p-TsOH·H2O as a Brønsted acid, and reacting at 100°C for 1 hour. After the reaction, the reaction product is purified by silica gel column chromatography to obtain the γ-ketone sulfone compound as shown in formula ( ). The raw materials used in this invention are simple and readily available, the operation steps are simple and easy to perform, it is applicable to substrates with various structures, has good substrate scalability, and the yield of the target product is good. The γ-ketone sulfone compounds prepared by this method can serve as important synthetic intermediates in organic synthesis, contribute to the development of novel drug molecules in medicinal chemistry, and be used in the preparation of functional materials in materials science, demonstrating good prospects for widespread application.

A shelf-stable aqueous reducing agent solution comprises a) a sulfinate of formula (Ia), b) a sulfonate of formula (Ib), and c) optionally, a sulfite of formula (Ic) M2SO3, wherein M is an equivalent of an alkali metal; wherein the total concentration of a), b) and c) is more than 10% by weight. The shelf stability of the reducing agent solution is significantly improved. The shelf-stable aqueous reducing agent solution is useful as a shippable form of a sulfinate of formula (Ia), in a method to inhibit decomposition of a sulfinate of formula (Ia) solution during storage and / or shipment, and in a method of performing a reducing step.